A relative term used to describe the location of one object in relation to another, in which the object described is farther aft than the other. Thus, the mainmast is abaft the foremast (in back of).
Abaft the beam
Said of the bearing of an object which bears between the beam and the stern (further back than the ship’s middle).
Get away from the ship, as in an emergency.
The bearing of an object 90 degrees from ahead (in a line with the middle of the ship).
Able bodied seaman
The next grade above the beginning grade of ordinary seaman in the deck crew.
In the vessel (on the ship).
Above decks; without concealment of deceit (out in the open).
Abeam of (alongside of).
A bushing plate around a hole in which a pintle works.
The portable steps from the gangway down to the waterline.
Hooks for the chains.
A solid piece of metal shaped like an acorn, and used to finish off the top of an upright in a railing contructed of pipe.
The effective increase in mass of a hull, due to the entrained water, when in motion.
Added weight method
One method used in the calculation of a ship’s damaged stability when it is partially fl ooded. It regards the water which has entered as an added weight, the basic hull envelope remaining. The other approach uses the concept of lost buoyancy.
Comes from the Arabic “Emir” or “Amir” which means “First commander” and “Al-bahr which means “the sea”. Emir-al-barh evolved into Admiral.
Loose from the moorings (not tied or secured).
A term used for the largest dry bulkcarriers.
At, or towards the stern of a vessel. (Opposite to forward.)
Aft peak tank
A tank or compartment located abaft the aftmost watertight transverse bulkhead above propeller(s) and rudder (often used for fresh water or sea water ballast).
Toward the stern. Between the stern and the amidship section of a vessel.
The section aft of amidships.
A term applied to a deck aft to the midship portion of a vessel.
Radiating cant frames fastened to transom plates.
A compartment just forward of the stern post. It is generally almost entirely below the load water line.
After peak bulkhead
A term applied to the first transverse bulkhead forward of the stern post. This bulkhead forms the forward boundary of the after-peak tank and should be made watertight.
The vertical line through the intersection of the load water line and the after edge of the stern post. On submarines or ships having a similar stern, it is a vertical line passing through the points where the design waterline intersects the stern of the ship>
That part of the stern which overhangs the keel.
Resting on the bottom.
A call used in hailing a vessel or boat (hey!).
A ring-shaped plate coaming surrounding the stack and fitted at the upper deck, just below the umbrella. It protects the deck structure from heat and helps ventilate the fireroom.
The vertical distance from the summer waterline to the highest point in the ship, usually the top of a mast.
An opening in the side of a ship or a deck house, usually round in shape and fitted with a hinged frame in which a thick glass light is secured. The purpose of the air port is to provide light and ventilation to and vision from the interior.
A metal air-tight tank built into a boat to insure flotation even when the boat is swamped.
A door so constructed that, when closed, air cannot pass through. They are fitted in air locks.
To the leeward side (away from the wind).
Alert (pep it up!).
The entire crew.
To bring to a sudden stop.
A vessel’s internal passageway or corridor.
Above the upper deck (above).
The position of a vessel when securely moored on a berth in port.
A step in a graving dock.
In the longitudinal, or fore-and-aft center of a ship. Halfway between stem and stern. The term is used to convey the idea of general locality but not that of definite extent.
(1) Midway (midpoint) between port and starboard sides of a vessel. (2) The midway point between the forward and aft perpendiculars.
A heavy steel device (of variable design) so shaped as to grip the sea bed to hold a vessel or offshore installation in a desired position.
Wooden bar with an iron shod, wedge shaped end, used in prying the anchor or working the anchor or working the anchor chain. Also used to engage or disengage the wild-cat.
A structure on the deck of a vessel upon which the anchor is mounted when not in use.
Chain or wire connecting a vessel to its anchor(s).
Heavy, linked chain secured to an anchor for mooring or anchoring.
The riding lights required to be carried by vessels at anchor.
A device to hold an anchor cable so as to prevent the anchor from running out or to relieve the strain at the inboard end.
The detail on deck at night, when at anchor, to safeguard the vessel (not necessarily at the anchor; a general watch).
A place suitable for anchoring.
Said of the anchor when just clear of the bottom (leaving or moving).
Same as angle bar
A bar of angle-shaped section used as a stiffener and on riveted ships ties floors to the shell.
Angle bent to fit a pipe, column, tank or stack, intersecting or projecting through a bulkhead or deck for the purposes of making a watertight or oiltight joint.
To heat a metal and to cool it in such a fashion as to toughen and soften it. Brass or copper is annealed by heating to a cherry red and dipping suddenly into water while hot. Iron or steel is slowly cooled from the heated condition to anneal.
A marine paint composition containing toxic ingredients preventing or retarding marine underwater growth on the hull of a vessel.
The space provided between propeller and stern post for the propeller.
Objects protruding from the underwater section of a hull; e.g., bilge keels, rudders, stabilising fins, shaft brackets, etc.
Relatively small portions of a vessel projecting beyond its main outline, as shown by cross-sections and water-sections. The word applies to the following parts of the stern and stern post: the keel below its shell line, the rolling keel or fin, the rudder, rudder post, screw, bilge keel, struts, bossing and skeg.
A plate fitted in the continuation of the shell plating above the forecastle sheer strake at the stem. These plates are sometimes fitted one in each side of the stem, and serve as foundation for the bow mooring pipes.
The principal axis member or spindle of a machine by which a motion of revolution is transmitted.
The curved portion of the stern frame over the screw aperture, joining the propeller post and stern post.
On the shore (on land).
The backward direction in the line of a vessel’s centreline.
Same as a beam
Transverse or across a vessel from side to side.
Across the ship, at right angles to the centreline.
Various winches, pumps motors, engines, etc., required on a ship, as distinguished from main propulsive machinery (boilers and engines on a steam installation).
Foundations for condensers, distillers, evaporator pumps or any of the auxiliary machinery in the engine or boiler rooms.
Machinery other than the ship’s main engines.
An order to stop or cease hauling (stop action at once).
Level with the water (water ready to, or slightly covering decks).
A canvas canopy secured over the ship’s deck as a protection from the weather (covering).
Aye, aye, sir
The reply to an officer’s order signifying that he is understood and will be obeyed (I understand).
Used on the opposite side of a bosom bar.
To throw water out of a boat; a yoke, as a ladder bail (rung).
The midship frames that are of equal shap and square flanged. There are thirty or more on a cargo vessel, equally divided between starboard and port sides.
A rudder with its axis halfway between the forward and after edge.
Capacity in hold to edge of frames and stiffeners; refl ects the stowage of bales or boxes.
(In cerpentry) a piece of timber from 4” to 10” square.
Any weight carried solely for the purpose of making the vessel more seaworthy. Ballast may be either portable or fixed, depending upn the condition of the ship. Fixed or permanent ballast in the form of sand, concrete, scrap or pig iron is usually fitted to overcome an inherent defect in stability or trim due to faulty design or changed character of service. Potrable ballast, usually in the form of water pumped into or out of the bottom, peak, or wing ballast tanks, is utilized to overcome a temporary defect in stability or trim due to faulty loading, damage, etc.
Double bottoms for carrying water ballast and capable of being flooded or pumped out at will.
Cylindrical structure built up to armor plates extending from the protected deck of a war vessel to the lower side of the turret shelf plate. They form protective enclosures in which are located the turret stools, shell stowage flats and ammunition hoisting gear for the turrets.
A craft of full body and heavy construction designed gor the carriage of cargo but having no machinery for self-propulsion.
A horizontal fore and aft reference line for vertical measurements. This line is perpendicular to the vertical center line. A horizontal transverse reference line for vertical measurements. This is line is perpendicular to the vertical center line. A horizontal transverse reference line for vertical measuremnts. This line is perpendicular to both the vertical center line and fore-and-aft base line.
A narrow strip of wood for fairing in lines. Also a stripof wood to fasten objects together. A strip of paulins in place. (Verb) To secure by means of battens, as to “batten down a hatch”.
To make watertight. Said of hatches and cargo (tie up or secure).
A tern applied to the planks that are fitted to the inside of the frames in a hold to keep the cargo away from the shell plating, the strips of wood or steel used to prevent shifting of cargo.
A derelict seaman found unemployed on the waterfront, especially in a foreign country (seaman without a ship).
(1) The registered breadth of a vessel, measured at the outside of the hull amidships, or at its greatest breadth. (2) A transverse structural member supporting a deck and/or strengthening a hull.
Angular fittings which connect beams and frames together.
The line showing the top of the frame line.
Beam plate angles
A beam made from a flat plate, with the flange bent at right angles by an angle-bending machine.
A wind at right angles to a vessel’s course (wind blowing at the ship’s side.)
Bear a hand
To assist or help.
To approach (overtake or come up to).
A term applied to foundations, particularly those having vertical web plates themselves are called bearers.
The direction of an object (with reference to you, your ship, another object).
A sailing vessel dead in the water due to lack of wind (not moving).
A rope eye for the hook of a block. A rope grommet used in place of a rowlock. Also, a small piece of rope with an eye in each end to hold the feet of a sprit to the mast. In general any small rope or strap used as a handle.
A structure fitted for support of the feet of the engine columns, as well as to provide support for crankshaft bearings. It also helps distribute engine weight and stresses to the ship’s structure. The bed plate consists of a series of transverse girders, connecting fore-and-aft members or girders.
To make fast as to a pin or cleat. To rescind an order (tie up).
A wooden or iron pin fitting into a rail upon which to secure ropes.
The flared open end of a cargo pipeline which is situated at close tolerances to the bottom of a liquid cargo tank.
see Ships Time
A rope passed around (center) a boat or other object for hanging.
Undernearth the surface of the water. Undernearth a deck or decks
The twisting or turning of a rope so as to fasten it to some object, as a spar or ring.
Large machine used to give curvature to plates by passage in contact with three rolls.
Heavy cast-iron blocks with square or round holes for “dogging down” arranged to form a large solid floor on which frames and structural members are bent and formed.
A place for a ship. The distance from frame line to frame line. A term applied to a bed or a place to sleep. Berths, as a rule, are permanently built into the structure of the staterooms or conpartments. They are constructed singly and also in tiers of two or three, one above the other. When single, drawers for stowing clothing are often built in underneath. Tiers of berths constructed of pipe are commonly installed in the crew space.
The space between any two, not necessarily adjacent, decks. Frequently expressed as “Tween Decks”.
Any angle other than 90o which one surface makes with another. Also to bevel a beam, flange, or plate for vee welding, to tilt a girder to make the sheer bevel.
A device that can be used to make a close bevel, less than 90o, or an open bevel, more than 90o.
Formed by bringing the end of a rope around, near to, or across its own part.
(1) Intersection or curved transition of bottom and sides of a hull. (2) Lowest points within hull compartments where liquids may accumulate.
Vertical transverse plate located beneath side frames in the area of the bilge and between inner and outer bottoms.
Non-retractable elongated longitudinal fin protruding from the bilge used to reduce rolling.
The curved shell plates that fit the bilge.
Line of shell plating at the bilge between bottom and side plating.
A bilge well is generally located in the lowest part of the compartment. It is used for drainage and is generally shaped like a box, and fitted to the underside of the inner bottom, with a strainer on top.
The lowest portion of a ship inside the hull, considering the inner bottom where fitted as the bottom hull limit.
Same a bilge
A walled enclosure built on the deck of a barge for the purpose of retaining cargo; also called a pen or cargo box.
A stand or case for housing a compass so that it may be conveniently consulted. Binnacles differ in shape and size according to where used and the size of the compass to be accpmmodated. A binnacle for a ship’s navigating compass consists essentially for a pedestal at whose upper and is a bowl-shaped receptacle having a sliding hood-like cover. This receptacle accommodates the gimbals supporting the compass. Compensating binnacles are provided with brackets or arms on either side, starboard and port, for supporting and securing the iron cylinders or spheres used to counteract the quadrantal error due to the earth’s magnetization of the vessel. This type of binnacle is usually placed immediately in front of the steering wheel, having its vertical axis in the vertical plane of the fore-and-aft center-line of the vessel.
Same as Plimsoll marks.
(Nautical). The inboard end of a vessel’s anchor chain which is made fast in the chain locker
Twin stout posts welded to the deck to which mooring lines are fastened.
A black, tar-like composition largely of bitumen or asphalt and containing such other ingredients as rosin, Portland cement, slaked lime, petroleum, etc. It is used as a protective coating in ballast and trimming tanks, chain lockers, shaft alleys, etc.
Member of the engine-room force, which included the engineers, firemen, oilers, and wipers.
A flange which is not drilled but which is otherwise complete.
A term applied to plugs screwed into the bottom of a ship to provide for drainage of the compartments when the vessel is in dry dock.
The name given a pulley or sheave, or system of pulleys or sheaves mounted in a frame, and used to multiply power when moving objects by means of ropes run over the sheaves. Single, double or triple-when used with the word “block” indicate the number of sheaves it contains.
Block and block
Same as two blocks.
Block and tackle
(Block and Falls). The complete unit of two or more blocks rove up with an adequate amount of rope.
A purchase (block and tackle) for hoisting a boat to its davits.
A pair of half transverse and elevations, with a common vertical center line. The right side gives the ship as seen from ahead, the left side from astern. Water lines, buttock and bow lines, diagonal lines, etc., are shown.
Any vessel, container or receptacle that is capable of generating steam by the internal or external application of heat. There are two general classes of boilers. I.E., fire-tube and water-tube.
A wall protecting the different deck spaces from the heat of the boiler room.
The structure upon which the boiler is secured. It generally consists of girders built up from plates and shapes. In a cylindrical boiler the athwartship girders are often called saddles.
A compartment in the middle or after section of a vessel where the boilers are placed.
The equivalent of a vessel’s mooring bitts used onshore
The static pulling force of a tugboat measured in pounds.
Cast steel heads or short columns secured to a wharf or dock, and used for securing the lines from a ship. The bitts on a ship may also be called bollards.
A piece of plate adjoining the hawse hole, to prevent the chafing of the ship’s bow. A plate foe support like a pillow or cushion.
The cover of a scuttle-way or small hatchway, such as that which leads to the forecastle or fore peak of a vessel.
A term applied to a spar used in handling cargo, or as the lower piece of a fore-and-aft sail.
A rest for a cargo-boom when lowered for securing for sea.
An outrigger attached to the mast, or a structure built up around a mast from the deck, to support the heel bearings for booms. Boom tables are necessary to provide working clearances when a number of booms are installd on one mast.
Durable paint coating applied to a hull between the light and loaded waterlines.
Special resistant paint or paints used to coat that portion of a vessel between light and load lines. Also the area to which this paint is applied.
A protruding flange above a port to keep drip from entering.
Shortening of the old term “boatswain,” an unlicensed member of the crew who supervises the work of the deck men under direction of the first mate.
The piece of board on which a man working aloft is swung.
The deck chest in which the bos’n keeps his deck gear.
The locker in which the bos’n keeps his deck gear.
The inside of an angle bar.
One angle fitted inside another.
A plate bar or angle fitted to an angle bar to connect the ends of two angles.
The part of the propeller to which blades are attached. Also the aparture in the stern frame where propeller shaft enters.
A frame bent around to fit the bose in way of the stern tube or shaft.
The plate fitted around the boss of a propeller post or around the curved frames in way of stern tubes.
Hydrodynamically faired outboard portion of hull plating surrounding and supporting propeller shafting. In a single-screw vessel the bossing is integral to a centreline skeg.
That part of the shell plating which is below the water line.
A term applied to the bottom shell plating in a double bottom ship.
A steel angle used for reinforcement at the junction of two steel plates.
A bar connecting the edges of a bulkhead to tank top, shell, decks, or another bulkhead.
The fore end or a ship.
Watertight hinged door in the fore end of a Ro-Ro vessel through which vehicles and cargo may be loaded or discharged
Curves representing a vertical section of the bow end of a ship. Similar curves in aft part of hull are buttock lines.
A rudder placed at the bottom of the forward stem and maneuvered from the fore peak.
A propulsor installed near the bow to provide a transverse thrust component enhancing manoeuvrability.
A spar extending forward from the stem.
The end of a barge which is squared for the full depth and width of the hull.
Boxing the compass
Calling names of the points of the compass in order.
A steel plate, commonly with a reinforcing flange, used to stiffen or tie beam angles to bulkheads frames to longitudinals, etc.
The side-to-side measurements of a vessel at any given place.
The maximum breadth measured over plating or planking, including heading or enders.
See Molded Breadth.
Measured amidships at its greatest breadth to outside of plating.
Of poop or forecastle. The point at which the partial poop or forcastle deck are discontinued.
Said of anchor when it lifts clear of the bottom.
A small cask for fresh water carried in ship’s boats. A sea (wave) with a curl on the crest.
A term applied to plates fitted on a forward weather deck to form a V-shaped shield against water that is shipped over the bow.
Cleaning the barnacles, paint, etc., from a ship’s bottom with a blow torch.
The transverse beam nearest to midship on the poop and forecastle deck.
Ahorizontal plate secured across the fore peak of a vessel to tie the fore-peak frames together and unit the bow.
The upper rail of a balcony on the quarter deck.
Horizontal plate brackets of generally triangular form connecting port and starboard side stringers and bow plating at the stem.
Elevated centre dedicated to the control and navigation of the vessel. [Alt. Navigating bridge or wheelhouse.]
The erection or superstructure fitted about amidship on the upper deck of a ship. The officer’s quarters, staterooms and accommodations are usually in the bridge house.
Lateral (open or enclosed) extension(s) to a vessel’s bridge to permit direct vision beyond the hull side.
Bridge, navigating or flying
The uppermost platform erected at the level of the top of the pilot house. It generally consists of a narrow walkway supported by stan-chions, running from one side of the ship to the other and the space over the top of the pilot house. A duplicate set of navigating instruments and controls for the steering gear and engine room signals are installed on the flying bridge so that the ship may be navigated in good weather from this platform. Awnings erected on stanchions and weather cloths fitted to the railing give protection against sun and wind.
A high transverse platform, often forming the top of a bridge house, extending from side to side of the ship, and from whick a good view of the weather deck may be had. An enclosed space called the pilot house is erected on the bridge in which are installed the navigating instruments, such as the compass and binnacle, the control for the steering apparatus, and the signals to the engine room. While the pilot house is generally entended to include a chartroom and sometimes staterooms, a clear passageway should be left around it. As the operation of the ship is directed from the bridge or flying bridge above it, there should also be clear, open passage from one side of the vessel to the other.
A V-shaped chain, wire, or rope attached to a vessel being towed to which the towline is connected.
Brass work, polished (also varnished wood work in yachts).
A small curved angle or flanged plate fitted on the outside of the shell of a ship over an air port to prevent water running down the ship’s side from entering the open port. Also called a watershed.
A transverse truss.
A plate that has warped from its original shape also a plate that is wider at the center than at the end.
A term applied to a floating object that is moored or anchored so that it remains at one place. Budys are used for marking the places on the water where a ship is sunk, where reefs are below, where the edges of the channel are, or to provide means for mooring ship at a desired position.
Ability to float, the supporting effort exerted by a liquid (usaually water) upon the surface of a boly wholly or partially immersed.
An inclined launching berth where the ship is built.
Or bulb angle bar. An angle with one edge having a bulb or swell.
A narrow plate generally of mild steel, rolled with a bulb or swell along one of its edges. Used for hatch coamings, built up beams, etc.
Same as bilge.
Cargo shipped in loose condition and of a homogeneous nature.
Vessel designed for the transportation of dry loose homogeneous cargoes in bulk in self-trimming holds and constructed to sustain the heavy concentrated weight distribution of the cargoes.
(1) A vertical structural partition dividing a vessel’s interior into various compartments for strength and safety purposes; (termed strength bulkhead). (2) Term applied to vertical partition walls (non-structural) subdividing the interior of a vessel into compartments.
Bulkhead bounding: bar
A bar used for the purpose of connecting the edges of a bulkhead to the tank top, shell, deck, or to another bulkhead. Angle bars are generally used for this purpose, as both flanges are easily calked.
Uppermost deck at which transverse watertight bulkheads terminate
An opening cut in a bulkhead just above the tank top connecting angle, and fitted with a valve which may be operated from the deck above.
A term applied to the beams or girders attached to a bulkhead for the purpose of supporting it under pressure and holding it in shape. Vertical stiffenera are most commonly used, but horizontal stiffeners or a combination of both may be used.
Bow with large rounded bow point underneath water line.
Barrier of stiffened plating at the outboard edge of the main or upper deck to prevent or inhibit entry of the sea. Bulwarks may be additionally employed at the forward edges of superstructure decks in lieu of safety railings as a barrier to wind and spray.
A brace extending from the deck to a point near the top of the bulwark, to keep it rigid.
Built-in bed aboard ship.
Compartment for the storage of oil or other fuel.
A brace extending from the deck to a point near the top of the bulwark, to keep it rigid.
A stationary floating object used as an aid for navigation.
The rough uneven edge of a punched or burnt hole or plate.
A joint made by fitting two pieces squarely together on their edges, which is then welded or butt strapped.
A bar or plate used to fasten two or more objects together with their edges butted.
A washing process used to gas free or clean a cargo tank, employing hot water or chemicals, sprayed through a patented rotating nozzle.
a deck access opening with bolted cover, designed for butterworth operations.
Counter. The rounded-in overhanging part on each side of the stern in front of the rudder, merging undernearth into the run.
The curves shown by taking a vertical longitudinal section of the after part of a ship’s hull, parallel to the keel.
By the board
Overboard (over the side).
By the head
Deeper forward (front end deepest in water).
By the Run
To let go altogether.
The captain’s quarters. The enclosed space of decked-over small boat.
A chain or line (rope) bent to the anchor.
Vessel designed for the laying and repair of seabed telecommunication cables.
Compartment located forward to store the anchor cable.
The same as hawser-laid.
100 fathoms or 600 feet (6 feet to a fathom).
To tighten a lap or other seam with a chisel tool, either ny hand or meckanically.
A wind or force less than one knot (knot 1 nautical mile per hour).
A projecting part of a wheel or other simple moving piece in machinery, so shaped as to give predetermined variable motion to another piece against which it acts, in repeating cycles.
Transverse convex curvature of exposed decks to accelerate runoff.
(In engineering) a decked vessel having great stability designed for use in the lifting of sunken vessel or structures. A submersible float used for the same purpose by submerging, attaching, and pumping out.
The inclination of an object from the perpendicular. As a verb, to turn anything so that it does not stand square to a given object.
Any of the beams supporting the deck plating or planking in the overhanging part of the stern of a vessel. They radiate in fan shape from the transom beam to cant frames.
That portion of a vessel’s boly either forward or aft in which the planes of the frames are not at right angles to the center line of the ship.
Hull side frame not aligned perpendicular to the vessel’s centreline.
The frame (generally bulb angles) at the end of a ship which are cented, that is, which rise obliquely from the keel.
A term applied to large cargo vessels that cannot transit either the Panama or Suez Canals. They are usually of the order of 120 000–180 000 DWT.
A ship is said to capsize when it loses transverse stability and rolls over and sinks.
Steel warping drum rotating on a vertical axis for the handling of mooring lines and optionally anchor cable.
A vertical drum or barrel operated by a steam engine and used for handing heavy anchor chains, heavy hawsers, etc. The engine is usually non-reversing and transmites its power to the capstan shaft through a worm and worm sheel. The drum is fitted with pawls to prevent overhauling under the strain of the hawser or chain when the power is shut off. The engine may be disconnected and the capstan operated by hand through the medium of capstan bars.
A wooden bar which may be shipped in the capstan head for heaving around by hand (to heave up anchor or heavy objects by manpower).
Captain of the Head
A guy who gets Head (toilet) cleaning detail.
Vessel designed for the delivery transportation of road vehicles.
The four principal points of the compass North, East, South and West.
Merchandise or goods accepted for transportation by ship.
Watertight door in the hull side through which cargo may be loaded or discharged.
Large opening in the dec to permit loading of cargo.
An opening, provided with a watertight cover or door, in the side of a vessels of two or more decks, through which the cargo is received and discharged.
A short beam running fore and aft between or under transverse deck beams. Also called headers when they support the ends of interrupted deck beams.
A type of plating made flush be vee butt welding or butt strap riveting.
A kind of plate joint by which an overlap can gradually be made flush. This is done with the aid of liners, and is used on the bow and stern to give the vessel a finer trim.
The extra case or bulkhead built around the ship’s funnel to protect the decks from heat. See Air Casing.
To let go.
Sacrificial or impressed current system of corrosion protection of hull, tanks and piping.
To fill in the seams with cotton or oakum.
The formation of bubbles on an aerofoil section in areas of reduced pressure. Can occur on heavily loaded ship propellers.
The inside skin of a vessel between decks, or in a small vessel from the deck beams to bilge.
Cellular container ship
Container vessel having specially designed vertical cell guides for the accommodation of standard size containers thereby precluding movement and lashing.
Cellular double bottom
A term applied where the double bottom is divided into numerous rectangular compartments by the floors and longitudinals.
A horizontal fore- and -aft reference line for athwartship measurements, dividing the ship into two symmetrical halves. A vertical reference line in the center of the body plan, midship section or other sections.
Center line bulkhead
A fore-and-aft or longitudinal bulkhead erected on the center line or in the same plane as the keel. Also a reference line scrived on a transverse bulkhead to indicate the center of the ship.
Centre of buoyancy (CB)
That point through which the buoyancy force acts. It is defi ned in space by its longitudinal, vertical and transverse (respectively, LCB, VCB and TCB) position relative to a set of orthogonal axes. It is also the centroid of volume of the displaced water.
Centre of flotation (CF)
The centroid of area of a waterplane. A small weight added, or removed, from the ship vertically in line with the CF will cause a change of draught without heel or trim. For a symmetrical ship the CF will be on the centerline and its position is given relative to amidships.
Centre of gravity (CG)
The point through which the force due to gravity, that is the weight of the body, acts. Its position is defi ned in a similar way to the centre of buoyancy and is very important in calculations of stability.
The longitudinal vertical plane of a vessel.
To wear the surface of a rope by rubbing against a solid object.
A guard of canvas or rope put around spars, mooring lines, or rigging to prevent them from wearing out by rubbing against something.
The compartment for storing the anchor chains, located near the hawse pipes in the bow of the ship.
Chain locker manger
Chain locker pipe
The iron-bound opening or section of pipe loading from the chain locker to the deck, through which the chain cable passes.
A bevel surgace formed by cutting away the angle of two faces of a piece of wood or metal.
The galley smoke-pipe (cook’s stove pipe), named after The English sea captain who was noted for the scrupulous cleanliness and shine of the brass aboard his ship.
Small room adjacent to the bridge for charts and navigating instruments.
To ease off gradually (go slower and move carefully).
Used in shaping plates, etc., to make sure that the template have not changed in size by shrinking or expending
The bilgeways, or curve of the bilges.
Chemical carrier (Tanker)
Vessel designed specifically for the transportation of volatile, poisonous or corrosive liquids in specially constructed tanks.
The crew’s term for the chief engineer.
Another term for first mate.
(In naval architecture) a small piece of wood used to make good any deficiency in a piece of tember, frame etc.
Deck fittings for mooring line to pass through.
The falls foul in a block. The falls may be chocked or jammed intentionally for a temporary securing (holding).
Organisations which set standards for design and construction of vessels and integral machinery amongst much else. Lloyd’s Register of Shipping, Bureau Veritas, Registro Italiano Navale, American Bureau of Shipping, Det Norske Veritas, Germanischer Lloyd, Nippon Kaiji Kyokai, Russian Maritime Register of Shipping, Hellenic Register of Shipping, Polish Register of Shipping, Croatian Register of Shipping, China Corporation Register of Shipping, China Classification Society, Korean Register of Shipping, Turk Loydu, Biro Klasifikasi Indonesia, Registo Internacional Naval, Indian Register of Shipping, International Naval Surveys Bureau, Asia Classification Society, Brazilian Register of Shipping, International Register of Shipping, Ships Classification Malaysia, Dromon Bureau of Shipping, Iranian Classification Society
A metal fitting having two projecting arms or horns to which a halyard or other rope is belayed. The deck, side plating, a stanchion, or other convenient structure serves as a support for securing the cleat.
A 4” to 6” angle bar welded temporarily to floors, plates, webs, etc. It is used as a holdfast which, with the aid of a bolt, pulls objects up close in fitting. Also, short lengths of bar, generally angle, used to attached and connect the various members of the ship structure.
A bow with an exterme forward rake, once familiar on sailing vessels.
A joint fitted clese by griding, pulled tight by clips, and welded.
The flattened, broadened after end of the stern foot.
Strictly speaking, coamings are the fore and aft framing in hatchways and scuttles, while the athwartship pieces are called head ladges, but the name coaming is commonly applied to all raised framework about deck openings. Coamings prevent water from running below, as well as strengthen the deck about the hatches.
The well of a sailing vessel, especially a small boat, for the wheel and steerman.
Coeffi cients of fineness
These relate to the underwater form and give a broad indication of the hull shape. They are the ratios of certain areas and volumes to their circumscribing rectangles or prisms.
A small space left open between two bulkheads as an air space, to protect another bulkhead from heat, fidre hazard or collision.
The plate used on an enclosed twin bossing, named for its shape. In reality it is inverted boss plate.
To lay down rope in circular turns.
A system of small diameter pipes installed inside a liquid cargo tank for the purpose of heating the cargo by means of hot oil or steam.
A ring used around a pipe or mast, or a flat plate made to fit around a girder or beam passing through a bulkhead. They serve to make various spaces watertight.
A watertight bulkhead approximately 25′ aft of the bow, extending from the keel to the shelter deck. This bulkhead prevents the entire ship from being flooded in case of a collision.
A large mat used to close an aperture in a aperture in a vessel’s side resulting from a collision.
The national ensign.
A convex curvature of the rake sides of a barge that produces a narrower beam at the headlog than the beam of the hull.
To bring a sailing vessel into the wind and change to another tack. One who is influenced to a change of opinion.
A covering over the top of a companionway.
A set of steps or ladder leading up to a deck from below.
A subvision of space or room in a ship.
The compass is the most important instrument of navigation in use on board ship, the path of a ship through the water depending upon the efficient.
A vessel with a steel frame and wooden hull and decks
Protective structure built up of armor plates and having verious shapes and sizes.
Vessel designed specifically for the transportation of standard size containers within the hull and on deck.
A fender made of granulated cork and covered with woven tarred stuff.
A bulkhead made from plates of corrugated metal or by flat plates alternately attached to the opposite flanges of the bulkhead stiffeners. Corrugated metal bulkheads are used around staterooms and quarters. Corrugated cargo hold bulkheads are generally constructed of flat plate alternately attached to opposite flanges of the stiffeners.
The part of a ship’s stern which overhangs the stern post.
A hole tapered or beveled around its edge to allow a rivet or bolt head to seat flush with or below the surface of the bolts object.
A rivet driven flush on one or both sides.
A framing built up on the ways and in which the ship rests while being launched.
A cup-shaped depression in a weld. The are tends to push the molten metal away from the center of the point being welded, thus forming the crater.
Used on oil tankers. A elevated runway from poop to midship, and midship, and midship to forecastle deck. It affords means of safe passage for crew members when deck is awash in stormy weather.
Foundations of heavy blocks and timbers for supporting a vessel during construction.
Cross curves of stability
A series of curves showing how a ship’s transverse stability varies, with displacement, for a range of heel angles. Curve of statical stability. A plot showing how the righting lever experienced by a ship varies with angle as the ship is rotated about a fore and aft axis. It defi nes a ship’s stability at large angles. Also known as the GZ curve.
Crossing the line
Crossing the Equator.
A temporary horizontal timber brace to hold a frame in position. Cross-spalls are replaced later by the deck beams.
Term sometimes used denoting the round-up or camber of a deck. The crown of an anchor is located where the arms are welded to the shank.
A lookout station attached to or near the head of a mast.
The platform or tub on the mast for the look-out.
Same as breast hooks, but fitted at the after end.
The forward edge of the stem or prow of a vessel at the water level.
The foremost part of the stem, cutting the water as the vessel forges ahead.
A piece of timber that is fastened to the poppets of the bilgeway and crosses them diagonally to keep them together. Dagger applies to anything that stands in a diagonal position.
One of the planks whick unite the headsof the poppets or stepping-up pieces of the cradle on which the vessel rests in launching.
A material made of tarred rope fibers obtained from scrap rope, used for calking seams in a wooden deck. It is also used for calking around pipes.
A curved metal spar for handling a boat or other heavy objects.
A set of cranes or radial arms on the gunwale of a ship, from whick are suspended the lifeboats.
Directly ahead on the extension of the ship’s fore and aft line.
The flat-surfaced midship section of a vessel on the sides above the bilge, or on the bottom below the bilge.
Steel disc, that is dogged down over a porthole to secure against breakage of the glass and to prevent light from showing through.
The upward slope of a ship’s bottom from the keel to the bilge. This rise is to give drainage of oil or water toward the center of the ship.
A shutter placed over a cabin window in stormy weather to protect the glass against the waves.
Steel or alloy cover plate fitted internally to portholes for protection against water ingress in case of glass failure.
An object, such as an anchor, piling, or concrete block, buried on shore.
Transverse inclination of the hull bottom from keel to bilge. [Alt rise of floor.]
The total weight of cargo, fuel, water, stores, passengers and crew and their effects that a ship can carry when at her designed full-load draft.
The cargo capacity of a vessel.
A platform or horizontal floor which extends from side to sede of a vessel.
Deck beam dimensions
The molding of a deck beam is its vertied dimension. Its siding is its horizontal dimension.
A round, steel fitting affixed to a vessel’s deck, designed to secure or guide cables for making up barge tows.
Vertical distance between moulded lines of 2 adjacent decks. [Alt deck interval.]
A small house on the after or midship section of a vessel.
Deck lashing strap
A steel deck fitting normally used as an attachment for cargo tie down lines.
The strip of deck plating that runs along the outer adge of a deck.
A term applied to any of the floors in the forward or after end of a vessel. Due to the converging sides of ships in the bow and stern, the floors become much deeper than in the main body.
A web frame or a frame whose athwartship dimension is over the general amount.
Tank (usually for fuel) having significant depth (typically spanning more than 1 deck interval).
These usually consist of ordinary hold compartments, but strengthened to carry water ballast. They are placed at either or both ends of the engine and boiler space. They are placed at either or both ends of the engine and boiler space. They are placed st either or both ends of the engine and boiler space. They usaually run from the tank top up to or above the lower deck.
A vessel obandoned and drifting aimlessly at sea.
A device consisting of a kingpost, boom with variable topping lift, and necessary rigging for hoisting heavy weights, cargo, etc.
The method of drawing the same lines on a flat surface which have already been drawn on a curved surface. The shapes and lines produced by development are the same as though the curved surface from which they are taken were a flexible sheet which could be spread out flat without change of area or distortion.
A line cutting the body plan diagonally from the frames to the middle line in the loft layout.
Alternator (generator) directly powered by a diesel prime mover producing AC electrical power. 9kw marine diesel generator
A position of a flag when lowered part way in salute (method of salute between vessels, like planes dipping wings).
The weight in tons of the water displaced by a ship. This weight is the same as the total weight of the ship when afloat. Displacement may be expressed either in cubic feet or tons, a cubic foot of sea water weighs 64 pounds and one of fresh water weighs 62.5 pounds, consequently one ton is equal to 35 cubic feet of sea water or 35.9 feet of fresh water. The designed displacement of a vessel is her displacement when floating at her designed draft.
A flag display or a sound, light, or radio signal calling for assistance.
A small bag used by seamen for stowing small articles.
A basin for the reception of vessels. “Wet” docks are utilized for the loading and unloading of ships.
Detailed structural plan and profile of the lower hull structure required for correct location of the vessel in dry docking.
A hold fast, a short metal rod or bar fashioned to form a clamp or clip and used for holding watertight doors, manholes, or pieces of work in place.
The last supports to be knocked away at the launching of a ship.
The belt on each side of the Equator in which little or no wind ordinarily blows.
A cluster of piles driven into the bottom of a waterway and bound firmly together for the mooring of vessels.
A small gass, stem or electric auxiliary engine, set on the deck and used for lifting, etc.
A tank whose bottom is formed by the bottom plates of a ship, used to hold water for ballast, for the storage of oil, etc. Also a term applied to the space between the inner and outer bottom skins of a vessel. Also applied to indicate that a ship has a complete inner or extra envelopeof watertight bottom plating. A double bottom is usually fitted in large ships extending from bilge to bilge and nearly the whole length fore-and-aft.
Double watertight hull construction, usually referring to hull sides but may include double bottom structure.
To double a vessel’s mooring lines.
A steel plate installed on an existing structural plate and used as a strengthening base for deck fittings or as a repair of a damaged area.
Extra plates (bars or stiffeners, added to strengthen sections where holes have been cut for hawse pipes, machinery, etc. Also placed where strain or wear is expected.
A pin of wood inserted in the edge or face of two boards or pieces to secure them together.
To take in, or lower a sail. To put out a light. To cover with water.
The distance from the surface of the water to the ship’s keel (how deep the ship is into the water).
DRAFT (DRAUGHT) (of a vessel)
The depth of a vessel below the waterline measured vertically to the lowest part of the hull, propellers or other reference points.
Draft , extreme
Draft measured to the lowest projecting portion of the vessel
Numbers marked on the hull side forward, aft (and amidships on large vessels) indicating the draft.
Depth to which a hull is immersed.
Draft measured at the stern.
Draft measured at the bow.
Draft at load displacement.
The numbers which are placed in a vertical scale at the bow and the stern of a vessel to indicate the draft at each point.
The average between draft measured at bow and at stern, or for a vessel with a straight keel, the darft measured at the middle length af waterline.
The amount that the aft end of the keel is below the forward end when the ship is afloat with the stern end down.
The chamber into which seepage water is collected and pumped by drainage pumps into sea through pump dales.
Vessel designed for the removal of sea bed alluvial sediment.
A display of national colors at all mastheads and the array of signal flags from bow to stern over the masthead (for special occasions and holidays).
The angle between a ship’s head and the direction in which it is moving.
A conical-shaped pin gradually tapered from blunt point to a diameter a little larger than the rivet holes in which it is to be used. The point is inserted in rivet holes that are not fair, and the other end is hammered until the holes are forced into line.
Vessel designed for sea bed drilling operations.
An open container, located on deck under the ends of a pipeline header to retain cargo drippage.
Cargo shipped in a dry state and in bulk; e.g., grain, cement.
(1) Large basin with sealing caisson for the repair and maintenance of vessels. (2) General term for basin dry docks, floating docks or lift platforms for the maintenance and repair of vessels.
A dock into which a vessel is flated, the water than being removed to allow for the construction or repair of ships.
Vertical or horizontal large cross-section conduit through which piping, cabling, or fluids may be conducted.
Longitudinal passage within the double bottom, usually on the centreline, extending from the collision bulkhead to the engine room, through which ballast, bilge, fuel and hydraulic piping may be conducted and providing access to double-bottom spaces.
That property of a metal which permits its being drawn out into a thread or wire.
A vessel without means of self-propulsion.
Blue working overalls.
Any materials used to block or brace cargo to prevent its motion, chafing, or damage and to facilitate its handling.
A piece of tubing, generally brass, used with paint to transfer rivet hole layout from template to plate. The end pf the pipe is dipped in paint, and while still wet is pushed through each template hole, leaving an impression on the plate.
A piece of steel fitted into an opening to cover up poor joints, or the crevices caused by poor workmanship.
Carefully (watch what you’re doing).
A pole or terminal in an electrical circuit. See Polarity.
Term given to hydraulic actuation systems where the hydraulic pressure is produced by electrically driven pumps and controlled via solenoids.
A round seizing at the end of a rope.
Reversing the position of an object or line.
Maximum time period (indicated in hours or days) that a vessel can operate unreplenished while performing its intended role.
Engine control room
Space adjacent to engine room from where engine room systems may be controlled and monitored.
Space where the main engines of a ship are located.
(1) The national flag. (2) A junior officer.
The forward under-water portion of a vessel at and near the bow.
Emergency Position Indicating Radio Beacon. EPIRB is a small hand-held battery-operated transmitter, actuated by water, for use in locating vessels in distress. EPIRBs are devices that trasmit a digital signal on the international distress signal frequency 406 MHz. Designed to work with satellites, EPIRBs are detectable by COSPAS-SARSAT satellites, which orbit the poles, and by the GEOSAR system which consists of GOES weather satellites and other geostationary satellites. There are two types of EPIRBs, Category I or Category II. Category I EPIRBs float-free and are automatically activated by immersion in water, and they are detectable by satellite anywhere in the world. Category II EPIRBs are similar to Category I, except in most cases they are manually activated, however some models can be automatically activated.
The process of hoisting into place and joining the various parts of a ship’s hull, machinery, etc.
When a boat redes on an even keel, its plane of flotation is either coincident or parallel to the designed water line.
A term applied to a joint which permits linear movement to take up the expansion and contraction due to changes in temperature.
A raised enclosure around an opening in the top of a liquid cargo tank which allows for heat expansion of the cargo.
Trunkways extending a short way into oil tanker compartments from the hatches. When the compartment is filled, the trunk is partly filled, and thus cuts down the free surface of the cargo, improving stability. Free space at the top is left for any expansion of the oil.
The forward end of the spacs below the upper decks of a ship which lies next abaft the stem, where the sides approach very near to each other. The hawse pipes are usually run down through the eyes of a ship.
A bolt having either a head looped to form a worked eye, or a solid head with a hole drilled through it forming a shackle eye. Its use is similar to that of a pad eye.
Fitting used for mooring arrangements.
To shape, assemble and secure in place the component parts in order to form a complete job.
High endurance vessels designed for processing and packing whale or fish resources off-loaded by smaller whaling or fishing vessels.
To fair a line means to even out curves, sheer lines, deck lines etc., in drawing and mold loft work.
A device consisting of pulleys or rollers arranged to permit the reeling in of a cable from any direction; often used in conjunction with winches and similar apparatus.
Plating fitted, in the shape of a frustrum of a cone, around the ends of shaft tubes and struts to prevent an abrupt change in the stream lines. Also any casting or plate fitted to the hull for the purpose of preserving a smooth flow of water.
A single turn of rope when a rope is coiled down.
To fake line back and forth on deck.
Commonly the antire length of rope used in a tackle, though strictly it means only the end to which the power is applied.
The overhanging stern section of a vessel, from the stern post aft.
Six feet. A sea-going measure of length.
To unite closely two planks or plates, so as to bring the surfaces into nitimate contact.
Pieces of wood which from the rim of a wheel.
To push off when making a landing.
Portable or fixed resilient protection against impact or chafing of areas of the upper hull.
This term is applied to various devices fastened to or hung over the sides of a vessel for the purpose of preventing rubbing or chafting. On small craft, such as tug boats, it consists of a timber or steel structure running fore and aft along the outside of the vessel above the water line. On the wearing surface. a strip of iron bark or a piece of flat bar iron is attached.
Vessel used to convey passengers and/or vehicles on a regular schedule between 2 or more points.
A tapered wooden pin used to separate the strands when splicing heavy rope.
Framework built around a deck hatch ladder, leading below.
A partially raised deck over the engine and boiler rooms, usually around the smokestack.
A day for general ship cleaning.
The rounded edge of a rolled steel angle or bar.
A projecting keel.
A triangular-shaped steel plate used to strengthen the connection between the towing bridle and the towing hawser.
The nation in which a vessel is registered and which holds legal jurisdiction as regards operation of the vessel, at home or abroad.
Flag pole, usually at the stern of a ship, carries the ensign.
A corrosion-resistant fine wire mesh screen used to cover certain openings on tank vessels to prevent the passage of flame into the tank.
The turned edge of a shape or girder, which acts to resist bending strain.
Outward curvature or widening of the hull above the waterline present in the bow section (of a conventional bow) to avoid shipping water.
The spreading out from the central vertical plane of the body of a ship with increasing rapidity as the section rises from the waterline to the rail.
A bow with an extreme flare at the upper and forcastle deck.
A small partial deck, built level, without curvature.
To coil flat down on deck, each fake outside the other, beginning in the middle and all close together.
A U-shaped dock with double skins which is filled by opening up the sillcocks, and allowed to settle sothe middle section will be lower than the keel of the ship so that repairs can be made on her hull.
The length of the hull, at any point, that can fl ood without immersing the margin line. Important in studying the safety of ships.
Vertical transverse full-breadth plating between inner bottom and bottom shell plating.
A horizontal section, showing the ship as divided at a water or deck line.
Vertical flat plates running transverse of the vessel, connecting the vertical keel with the margin plates or the frames to which the tank top and bottom shell is fast-ened.
The parts of a wrecked ship and goods lost in shipwreck, both found floating.
The palm of an anchor. The broad holding portion which penetrates the ground.
A deck running from stem without being broken by forecastle or poop.
Flush deck hatch
Hatch in a deck with no coaming.
Flush deck ship
Vessel having an upper deck extend continuously from bow to stern.
A substance such us as borax, used in welding to help in the melting of the metal. Flux also serves to stabilize the electric arc, steady the flow of the filler metal into the weld and protect the weld from oxidation.
A modem version of the old term “forecastle,” or bow section of the ship, where the crew lived.
Hatch around smokestack and uptake.
A sound signal device (not necessarily mechanically operated).
Said of a vessel when forced to heave to or lie at anchor due to fog.
Fore and aft
Parallel to the ship’s centerline.
The narrow extremity of a vessel’s bow. Also the hold space within it.
Fore peak tank
Tank (often for ballast/trimming) forward of the collision bulkhead.
The forward part of the bow which overhangs the keel.
Toward the stem. Between the stem and amidships.
That part of a hull forward of amidships.
Raised and enclosed forward superstructure section of the hull.
A deck over the main deck at the bow.
Foremost section of exposed main deck.
The forward end of a vessel’s stem which is stepped on the keel.
Or breast hook.
The bulkhead nearest the stem, which forms the after boundary of the forepeak tank. When this bulkhead is extended from the bottom of the ship to the weather deck, it is also called the collision bulkhead.
Forest product carrier
Vessel designed for the transportation of processed timber with large hatchways simplifying stowage and transfer of cargo.
A mass of metal worked to a special shape by hammering, bending, or pressing while hot.
A half beam to support a deck where hatchways occur.
Formal safety assessment (FSA)
A process for assessing the safety of a ship by studying the risks, their likelihood and consequences.
Towards or at the fore end of a vessel. (Abbr. Fwd or For’d.)
A line perpendicular to the keel line, and intersecting the forward side of the stem at the designed load water line.
Jammed, not clear.
Said of the anchor chain when moored and the chain does not lead clear of another chain.
To fit and bed firmly. Also, equipped.
To sink (out of control).
Floating production, storage and offloading vessel.
Vertical structural component supporting and/or stiffening hull side plating and maintaining the transverse form.
The section of a frame that rises above the deck line.
Lines of a vessel as laid out on the mold loft floor, showing the form and popsition of the grames. Also the line of intersection of shell with heel of frame.
The fore-and-aft distances between frames, heel to heel.
Points at which transverse frames (or floors) are located, indicated on the baseline, numbered from zero at the aft perpendicular and terminating at or beyond the forward perpendicular. Stations abaft the aft perpendicular are numbered negatively.
The ribs of a ship.
Vertical measurement from the vessel’s side amidships from the load waterline to the upperside of the freeboard deck.
The uppermost complete deck exposed to weather and sea, which has permanent means of weathertight closing of all openings in the exposed part, and below which all openings in the vessel’s sides are fitted with permanent means of watertight closing.
Some ships have freefall lifeboats, stored on a downward sloping slipway, dropping into the water as holdback is released. Such lifeboats are considerably heavier to survive the impact with water. Freefall lifeboats are used for their capability to launch nearly instantly and high reliability, and since 2006 are required on bulk carriers that are in danger of sinking too rapidly for conventional lifeboats to be released. Tankers are required to carry fireproof lifeboats, tested to survive a flaming oil or petroleum product spill from the tanker. Fire protection of such boats is provided by insulation and sprinkler system, which has pipe system on top, through which water is pumped and sprayed to cool the surface. This system, while prone to engine failure, allows fireproof lifeboats to be built of fiberglass and not only metal.
A port in the bulwark for the purpose of freeing the deck of water.
A large opening in the bulwark on an exposed deck of a seagoing vessel which provides for the rapid draining of water from that deck.
Heles in the bulwark or rail, which allow deck wash to drain off into the sea. Some freeing ports have swing gates which allow water to drain off but which aytomatically close from sea water pressure.
A ship designed to carry all types of general cargo, or “dry cargo.”
External fairing through which exhaust ducting is conducted.
Strips of timber or boards fastened to frames, joists, etc., in order to bring their faces to the required shape or level, for attachment of sheating, ceiling, flooring etc.
Anything of Government Issue.
A slang term applied to various fittings.
A standard of measure.
Kitchen compartment aboard a vessel.
The process of coating one metal with another, ordinarily applied to the coating or iron or steel with zinc. The chief purpose of galvanizing is to prevent corrosion.
Same as gang plank.
A board with cleats forming a bridge reaching from a gengway of a vessel to the wharf.
The opening in the bulkwarks of a vessel through which persons come on board of disembark. Also a gang plank.
A line rove through a single block secured aloft.
High level structure supporting a traversing lifting appliance.
Strake (line) of shell plating immediately adjacent to the keel (centreline) plating.
A strake which ends before reaching the stem or stern post. Such strakes are laid at or near the middle of the ship’s sides to lessen the spiling of the plating.
Tanker designed for the transportation of liquefied gases.
The process of removing all hazardous gases and residues from the compartments of a vessel
An elastic packing material used for making joints watertight.
Packing materials, by which air, water, oil, or steam tightness is secured in such places as on doors, hatches, steam cylinders, manhole covers, or in valves, between the flanges of pipes, etc. Such materials as rubber, canvas, asbestos, paper, sheet lead and copper, soft iron, and commercial products are extensively used.
To attain headway (to get going or pick up speed).
A waterway marker which measures the level of the water in foot increments; also refers to the specific measure on the gauge.
The general name for ropes, blocks and tackles, tools, etc. (things).
Highly detailed plan drawings of the general layout of a vessel.
A metal fitting that holds a member in place, or presses two members together.
Gilguy (or gadget)
A term used to designate an object for which the correct name has been forgotten.
A drum of a windlass for heaving in line.
(1) Longitudinal continuous member with a vertical web providing support of deck beams. (2) Longitudinal continuous vertical plating on the bottom of single- or double-bottomed vessels.
The distance measured on any frame line, from the intersection of the upper deck with the side, around the body of the vessel to corresponding point on the opposite side. The half gith is taken from the center line of the keel to the upper deck beam end.
Term used by mariners for a barometer.
Global Maritime Distress Safety System. The GMDSS is an internationally agreed-upon set of safety procedures, types of equipment, and communication protocols used to increase safety and make it easier to rescue distressed ships, boats and aircraft. GMDSS consists of several systems, some of which are new, but many of which have been in operation for many years. The system is intended to perform the following functions: alerting (including position determination of the unit in distress), search and rescue coordination, locating (homing), maritime safety information broadcasts, general communications, and bridge-to-bridge communications. Specific radio carriage requirements depend upon the ship’s area of operation, rather than its tonnage. The system also provides redundant means of distress alerting, and emergency sources of power.
Tan work shoes issued to U.S. Maritime Service trainees
A return, or 180o bend, having one leg shorterthan the other. An iron swivel making up the fastening between a boom and a mast. It consists of a pintle and an eyebolt, or clamp.
Atool with an half round cutting edge used to cut grooves.
A small anchor with several arms used for dragging purposes.
A wooden lattice-work covering a hatch or the bottom boards of a boat; similarly designed gratings of metal are frequently found on shipboard.
An open iron lattice work used for covering hatchways and platforms.
The middle watch.
A dry dock. The vessel is floated in, and gates at the entrance closed when the tide is at ebb. The remaining water isthen pumped out, and the vessel’s bottom is graved, or cleaned.
A large body of water taken aboard (ship a sea).
The sharp forward end of the dished keel on which the stem is fixed.
A reing of fiber usually soaked in red lead or some other packing material, and used under the heads of bolts and nuts to preserve tightness.
Gross registered tonnage
A formula-derived measure of the internal (enclosed) volume of a vessel less certain excluded spaces. (Stated in volumetric tons where 1 ton = 100 ft3 , 2.8317 m3.) (Abbr. grt.)
The volume measurement of the internal voids of a vessel wherein 100 cu. ft. equals one ton.
A term used to cover all of the anchor gear.
Running ashore (hitting the bottom).
Large pieces of timber laid across the ways on which the keel blocks are placed. Also the large blocks and plans which support the cradle on which a ship is launched.
A metallic eye bolted to the stern post, on which the rubber is hung.
The upper edge of a vessel or boat’s side.
That part of a barge or boat where the main deck and the side meet.
A term applied to the bar connecting a stringer plate on a weather deck to the sheer strake.
A steel plate used for reinforcing or bracing the junction of other steel members.
A tie plate, used for fastening posts, frames, beams, etc., to other objects.
A bar laid across a hatchway to support the hatches.
The sunken trough on the shelter deck outer edge which disposes of the water from the deck wash.
Wire or hemp rope or chains to support nooms, davits, ets., laterally. Guys are employed in pairs. Where a span is fitted between two booms, for example, one pair only is required for the two.
The distance from the centre of gravity to the line of action of the buoyancy force. It is a measure of a ship’s ability to resist heeling moments.
To address a vessel, to come from, as to hail from some port (call).
A short deck below the main deck.
A modle of one side of a ship, on which the plate lines are drawn in.
A plan or top view of half of a ship divided longitudinally. It shows the water lines, bow and buttock lines, and diagonal lines of construction.
The position of a flag when lowered halfway down.
Halliards or halyards
Ropes used for hoisting gaffs and sails, and signal flags.
A member of the ship’s company.
A lead of from 7 to 14 pounds used with the hand lead line for ascertaining the depth of water in entering or leaving a harbor. (Line marked to 20 fathoms.)
A steadying rail of a ladder (banister).
Same as “grab rope” (rope).
As tight as can be pulled by hand.
A watch tackle (small, handy block and tackle for general use).
Dry bulk carrier of 35 – 50,000 tonnes deadweight, popular for full efficiency, flexibility and low draft (<12 m).
A term applied to bulk carriers of 40 000–65 000 DWT.
Hang from the yards
Dangle a man from one of the yard arms, sometimes by the neck, if the man was to be killed, and sometimes by the toes, if he was merely to be tortured. A severe punishment used aboard sailing ships long ago. Today, a reprimand.
A plate riveted over another plate to cover a hole or break.
The fore parts of the wales of a vessel which compass her bows and are fastened to the stem, thickened to withstand plunging.
Opening in a deck providing access for cargo, personnel, stores, etc.
The bars by which the hatches are fastened down.
Raised rim of vertical plating around a hatchway to prevent entrance of water, the upper edge of which forms a sealing surface with the hatch-lid or cover.
One of the large square openings in the deck of a ship through which freight is hoisted in or out, and access is had to the hold. There are four pieces in the frame of a hatchway. The fore-and-aft pieces are called coaming and those athwartship are called head ledges. The head ledges rest on the beams and the carlines extending between the beams. There may be forward, main and after hatcheays, according to the size and character of the vessel.
The part of a ship’s bow in which are the hawse holes for the anchor chains.
An iron plate covering a hawse hole.
A hole in the boow through which a cable or chain passes. It is a cast steel tube, having rounded projecting lipe both inside and out.
Steel pipe duct through which the anchor cable is led overboard.
Hawse plug or block
A stopper used to prevent water from entering the hawse hole in heavy weather.
A pipe lead-in for anchor chain through ship’s bow.
A rope used for towing or, mooring.
A large circumference rope used for towing or mooring a vessel or for securing it at a dock.
Left-handed rope of nine strands, in the form of three three-stranded, right-handed ropes.
(1) The bow of a vessel. (2) Term given to toilet facilities usually in the smaller craft context.
Head of navigation
The uppermost limit of navigation from the mouth of a waterway.
The height of the decks, below decks.
The reinforced, vertical plate which connects the bow rake bottom to the rake deck of a barge or square-stemmed boat.
The inside center strand of rope.
The vertical movement of a ship, as a rigid body, in a seaway.
To revolve the drum of a capstan, winch or windlass. (Pulling with mechanical deck heaving gear).
An order to haul away or to heave around a capstan (pull).
To haul in.
To heave in until the vessel is riding nearly over her anchor.
To haul in until the line has a strain upon it.
Heave the lead
The operation of taking a sounding with the hand lead (to find bottom).
To bring vessel on a course on which she rides easily and hold her there by the use of the ship’s engines (holding a position).
A small line thrown to an approaching vessel, or a dock as a messenger.
Vessel designed specifically for the loading/discharge and transportation of very heavy cargoes.
Inclination of a vessel to one side. [Alt list.]
Vertical distance between any two decks, or vertical distance measured from the base line to any water line.
A term applied to the tiller, wheel, or steering gear, and also the rubber.
The hole in the counter of a vessel through which the rubber stock passes.
Rope made of the fibers of the hemp plant and used for small stuff or less than 24 thread (1.75 inch circumference). (Rope is measured by circumference, wire by diameter.)
High, wide and handsome
Sailing ship with a favorable wind, sailing dry and easily. A person riding the crest of good fortune
Hip towing (hipping)
A method of towing whereby the vessel being towed is secured along-side the towboat
A scrub-broom for scraping a ship’s bottom under water.
A fore-and-aft frame, forming a truss for the main frames of a vessel, to prevent bending.
The curve of the deck on a vessel constructed so that the middle is higher than the ends.
A ship that is damaged or strained so that the bottom curves upward in the middle opposite of sagged.
A ship is said to hog when the hull is bent concave downwards by the forces acting on it. Hogging is the opposite of sagging.
An order to haul up.
That part of a ship where cargo or supplies are carried.
The beams that support the lower deck in a cargo vessel.
A dog or brace to hold objects rigidly in place.
An imperfection, spots left unfinished in cleaning or painting.
The soft sandstone block sailors use to scrub the deck, so-called, because seamen were on their knees to use it.
A covering for a companion hatch, scuttle or skylight.
The endmost plate of a complete strake. The hooding-ends fit into the stem or stern post.
Barge designed with a single hopper type hold for the transport of bulk cargo and where the cargo is discharged (dumped) through the bottom of the vessel.
Lower side ballast tank in a bulk carrier, shaped and positioned to create a hopper form to the cargo hold.
A fitting, usually with two horn-shaped ends, to which lines are made fast. The classic cleat is almost anvil-shaped.
Setting the frames of a vessel square to the keel after the proper inclination to the vertical due to the declivity of the keel has been given.
The latitudes on the outer margins of the trades where the prevailing winds are light and variable.
A standard unit of power which is often classified in connection with engines as brake, continuous input, intermittent, output, or shaft horsepower.
A small, light plate fitted on the counter around the rubber stock for the purpose of preventing water from backing up into the rudder trunk. Frequently it is made in two pieces.
That portion of a mast between the deck and the hounds.
The mast head projections which support the trestle trees and top. Also applied in vessels without trestle trees to that portion at which the hound band for attaching the shrouds is fitted.
To stow or secure in a safe place. A top-mast is housed by lowering it and securing it to a lowermast.
Distinguishing flag of a merchant marine company flown from the mainmast of merchant ships.
That portion of a mast below the surface of the upper deck.
Vessel designed to ride on a cushion of air formed by downthrusting fans.
To keep close.
A worn out vessel.
The main body or primary part providing global strength, buoyancy and hydrodynamic qualities of a vessel.
Said of a vessel when, due to its distance on the horizon, only the masts are visible.
Combined hull structure contributing to the longitudinal global strength of a hull treated as analogous to a girder.
Force of wind over 65 knots.
Same as bridge.
High-speed craft with immersed foils for developing hydrodynamic lift at speed and a consequential reduction in resistance.
Vessel designed for the survey of seabed topography, currents, etc., relevant to marine navigation.
Rotatable lateral fin providing vertical directional control for submersible craft.
A pressure test employing a static head of water applied to various compartments or components of a vessel.
Vessel designed for transiting sea ice or for the purpose of creating a channel in polar or winter ice for the passage of other vessels.
Caught in the ice.
A term applied to several piles that are bound together situated either at the corner of a pier or out in the stream and used for docking and warping vessels.
Towards the center line of a ship (towards the center).
A plan representing a longitudinal section through the center of the vessel, showing heights of decks, location of transverse bulkheads, assignment of various spaces and all machinery, etc., located on the center or betweenthe center and the shell on the port side.
The tank top.
A tow of box-ended barges which, as a complete unit, is raked at the bow, boxed at the intermediate connections, and boxed or raked at the stern.
Plates which fit between floors to stiffen the double bottom of a ship. Intercostal comes from the Latin words inter, meaning between, and costa, meaning rib.
An untidy loose end of a rope (or rags).
A method of framing a vessel which employs closely spaced longitudinals, with extra heavy floors spaced further apart.
The flag similar to the union of the national flag.
A ladder with wooden steps and side rops
Sailors were once called by their first names only, and Jack was their generic name. Tar came from seamen’s custom of waterproofing clothing using tar.
Flagpole at the bow of a ship.
A ladder of rope with rungs, used over the side.
To wedge tight.
To throw goods overboard.
A landing wharf or pier; a dike at a river s mouth.
The ring bolted to the upper end of the shank of an anchor and to which the bending shackle secures.
The arm or boom of a crane providing the reach (working radius).
The lap a joint by keeping one edge straight and bending the other, in order to leave both surface even on one side.
A pirate’s flag carrying the skull and cross-bones.
That portion of a shaft or other revolving member shich transmits weight directly to end is in immediate contact with the bearing in which it turns.
A derrick designed with a very high lifting capacity, often installed on heavy-lift vessels.
The conversion of a vessel to increase displacement by means of a mid-length transverse cut and the installation of a new section.
To leave a ship without authority (deserting).
A term applied to temporary structures, such as masts, rubbers, etc., used in an emergency.
Makeshift rig (emergency rig).
The lowest structural member of a ship or boat which runs the length of the vessel at the centerline and to which the frames are attached.
Lowest longitudinal strake of plating along the bottom centreline of the hull.
Support block(s) located beneath the keel strake which are employed during dry-docking of a vessel.
Blocks on which the keel of a vessel rests when being built, or when she is in a drydock.
A bracket, usually a triangular plate, connecting the vertical keel and flat keel plates, between the frames or floors of a ship.
In dry docking, the weight of a ship is carried almost entirely on the keelson provide the means of distributing the pressure on the center line and docking keels composed of doubling strips of plate or built-up girders are sometimes fitted on the bottom at a distance from the center line corresponding to the best position for the bilge block. The docking keels are fitted in a fore-and-sft direction, generally parallel or nearly so to the keel.
An imaginary line describing the lowest portion of a vessel’s hull.
A plate running along the top of the floors and connecting to the vertical keel.
To tie a rope about a man and, after passing the rope under the ship and bringing it up on deck on the opposite side, haul away, dragging the man down and around the keel of the vessel. As the bottom of the ship was always covered with sharp barnacles, this was a severe punishment used aboard sailing ships long ago. Today, a reprimand.
Longitudinal vertical member above the keel to which frames are attached. (Wooden construction.)
Keep a sharp look-out
A look-out is stationed in a position to watch for danger ahead. To be on guard against sudden opposition or danger.
A detachable shackle which is used to join two forged anchor chain links together.
Pig iron used either as temporary weight for inclining a vessel or as permanent ballast.
In joiner work, a slit or cut made by a saw. Kerfs are made where timber joints require adjusting. Also applied to the channel burned out by a cutting torch.
A heavy, metal deck fitting having two horn-shaped arms projecting outward around which lines may be made fast for towing or mooring of a vessel hull.
The main center pillar posts of the ship. May be used as synonym for samson post.
The upper spoke of a steering wheel when the rudder is amidships, usually marked in some fashion (top spoke of neutral steering wheel).
A twist in a rope.
Outdated term for a bracket connecting a deck beam and side frame.
To stop, especially to stop work.
The situation of a vessel when listed over by the wind to such an extent that she does not recover.
One nautical mile per hour (1.852 km/h, 0.5144 m/s).
A twisting, turning, tying, knitting, or entangling of ropes or parts of a rope so as to join two ropes together or make a finished end on a rope, for certain purpose.
Abrupt change in direction of hull surface or structure.
A line on the stern of a ship, on the cant frames, which divides the upper and lower parts of the stern.!
A vessel is said to labor when she works heavily in a seaway (pounding, panting, hogging and sagging).
A metal, wooden or rope stairway.
Term for disabled vessel that had to fall out of a convoy and thus became easy prey for submarines.
The spaced distance from the edge of a bar or plate to the center of the rivet holes.
Flat-bottomed shallow-draft vessel designed to beach, with a bow and/or stern ramp for the transfer of cargo/payload.
Opposite of sight edge, which see.
Landing ship dock
Large naval vessel capable of carrying small landing craft and amphibious vehicles, despatched via a floodable stern dock within the hull.
The second strake from the gunwale.
The seaman’s term for one who does not go to sea.
A rope made fast to an article for securing it (knife lanyard, bucket lanyard, etc.), or for setting up rigging.
A term applied to the distance that one pieces is laid over the other in making a lap joint.
Applied to boats built on the clinker system, in which the starkes overlap each other. The top strake always laps on the outside of the strake underneath.
A passing and repassing of a rope so as to confine or fasten together two or more objects; usuafly in the form of a bunch.
To place in the water.
The order to go aloft (go up above).
Placing the necessary instructions on plates, shapes, etc., for planing, shearing, punching, bending, flanging, beveling, rolling, etc., from the templates made in the mold loft or taken from the ship.
A low headroom space below decks used for provisions or spare parts, or miscellaneous storage.
A light rope or trackle by which a boom is prevented from swinging around.
The land to the leeward of the vessel (wind blows from the ship to the land).
The direction away from the wind.
Length between perpendiculars
The length of a ship measures from the forward side of stem to the aft side of the stern post at the height of the designed water line.
Length over all
The length of a ship measured from the foremost point of the stem to the aftermost part of the stern.
Permission to be absent from the ship for a short period (authorized absence).
(1) Rigid-hulled survival craft deployed from a parent vessel. (2) SAR craft.
A line secured along the deck to lay hold of in heavy weather; a line thrown on board a wreck by life-saving crew; a knotted line secured to the span between life-boat davits for the use of the crew when hoisting and lowering.
Lift a template
Is to construct a template to the same size and shape as the part of the ship involved. To lay aot a template is to transfer the size and shape into the material and work it into the fabricated object.
Transferring marks and measurements from a drwing, model, etc., to a plate or other object, by templates or other means.
The lifting equipment (i.e., cranes) for loading and discharging operations.
Light load line
The water line when the ship rides empty.
A thick glass, usually circular in shape, fitted in a frame fixed in an opening in a ship’s side, deck house, or bulkhead to provide access for light. The fixed light is not hinged.
Large hole cut in a structural member to reduce its weight.
A full-bodied, heavily built craft, usually not self-propelled, used in bringingmarchandise or cargo alongside or in transferring same from a vessel.
The vessel condition without any form of deadweight aboard (incl.fuel and ballast).
Chains passing through the limber holes of a vessel, by which they may be cleared of dirt.
Small hole or slot cut in a structural member to permit the drainage of liquid.
Holes in the bottoms of floors throught which bilge water runs through tank sections to a seepage basin, where it is then pumped out. The row of holes constitutes the limber passage.
The strake on the inner skin of a vessel which is nearest to the keel.
A general term for light rope.
Vessel (over 1000 grt) operating on a regular route between ports according to a particular schedule.
The ropes or cables used on a vessel for towing, mooring, or lashing.
Plans indicating the hull form via the inclusion of waterlines, buttock lines and section lines shown on profile, plan and end views.
To learn to one side.
Vessel designed to transport natural gas in liquefied form.
Load eater line
The water line when the ship is loaded.
Load line markings
Markings on the ship’s side defi ning the minimum freeboard allowable in different ocean areas and different seasons of the year. Also known as Plimsol mark.
A storage compartment in a ship.
A man who lays out the ship’s lines in the mold loft and makes the molds or templates therefrom.
A continious operating recerd of a ship kept by one of its officers. In it are recorded daily all important events occurring on board, also the condition of the weather, the ship’s position and other data.
A book containing the official record of a ship’s activities together with remarks concerning the state of the weather, etc.
A ship which is slightly unstable in the vertical position will heel until the GZ curve becomes zero. It is said to loll and the angle it takes up is the angle of loll.
A line in the fore and aft direction parallel to the centreline. Also refers to a longitudinal stiffener running parallel (or nearly parallel) to the centreline.
A partition wall of planking or plating running in a fore-and-aft direction. Oil tankers are required to have at least one fore-and-aft bulkhead in the cargo oil space. Fore-and-aft bulkheads are very common on warships.
Longitudinal centre of buoyancy (LCB)
The fore and aft location of the centre of buoyancy.
Longitudinal centre of gravity (LCG)
The fore and aft location of the centre of gravity.
The stability of a ship for rotation (trim) about a transverse axis.
A laborer who works at loading and discharging cargo.
The man stationed aloft or in the bows for observing and reporting objects seen.
The part of an oar between the blade and handle. The reflection of a light below the horizon due to certain atmospheric conditions.
A small opening to permit the passage of air for the purpose or ventilation, which may by partially or completely closedby the operation of overlapping shutters.
Vessel designed to transport petroleum gas in a form of butane or propane.
The black line parallel with ship’s keel marked on the inner surface of the bowl of a compass, indicating the compass direction of the ship’s head.
The sudden heave of the ship.
A gun used in the life-saving services to throw a life line to a ship in distress or from ship to shore and used when a boat cannot be launched.
Term covering main engines, auxiliary engine room machinery(e.g.,pumps, compressors, etc.,) in addition to other installed plant (e.g., hydraulics, air-conditioning plant, lift machinery, etc.,) and deck machinery (e.g., mooring winches, windlasses, etc.).
A steel fitting formed by a flat doubler plate and vertical steel member containing a circular opening.
Internal space dedicated to the storage of munitions (shells, surface-to-air missiles, etc.) in a naval vessel.
The main longitudinal beam on a ship, running down the center line and supports as a rule by king posts. Sometimes there are two main beams, on each side of the center line.
The hull exclusive of all deck erections spars, streaks, etc., the naked hull.
Main breadth line
The greatest width of a ship amidships. If a ship’s sides tumble home, the main breesth line will be considerably below the bulwarks.
The main continuous deck or principal deck of a vessel
The principal mast of a vessel.
Hoisting the ensign at 8 a.m. and down at sunset.
Make the course good
Steering; keeping the ship on the course given (no lazy steering).
Make the land
Landfall. To reach shore.
To leak; take in water.
Ropes hung and used for assistance in ascending and descending.
The perforated. Elevated bottom of the chain locker which prevents the chains from touching the main locker bottom, and allows see page water to flow to the drains.
A hole in a tank, boiler or compartment on a ship, designed to allow the entraned of a man for examination, cleaning and repairs.
A framed opening in the deck of a vessel which primarily provides access for a man.
A cover which seals a manhole and is usually designed to lock in place by twisting or using a centerbolt, studbolts, or dogs.
A casting or chest containing several valves. Suction or discharge pipes from or to the various compartments, tanks, and pumps are led to it, making it possible for several pumps to draw from or deliver to a given place through one pipe line.
Rope made from the fibers of the abaca plant.
A longitudinal plate whick closes off the ends of the floors along the widship section
Pointed iron implement used in separating the strands of rope in splicing, marling, etc.
To put a person ashore with no means of returning.
To join two ropes ends so that the joint will run through a block, also to place two ropes alongside each other so that both may be hauled on at the same time.
A spar or hollow steel pipe tapering smaller at the top, placed on the center line of the ship with a slight after rake. Masts support the yards and gaffs. On cargo vessels they support cargo booms.
A hole in the deck ti receive a mast. The diameter of the hole is larger than the mast for the purpose of receiving two rows of founded wedges to hole the mast in place.
The frame on the keelson of boat (does not apply on ships) to which the heel of a mast is fitted.
A structure built up around a mast as a support for the cargo boom pivots.
A term for the captain, a holdover from the days when the captain was literally, and legally, the “master” of the ship and crew. His word was law.
The top part of the mast.
The white running light carried by steam vessel underway on the foremast or in the forepart of the vessel.
Slabs, usually constructed of timbers, which are placed on the deck of a vessel for the purpose of supporting and distributing the weight of heavy loads. back
Slabs, usually constructed of timbers, which are placed on the deck of a vessel for the purpose of supporting and distributing the weight of heavy loads.
Equipment used for serving meals.
A light line used for hauling over a heavier rope or cable.
A member of the steward’s department who served meals to officers and crew.
A space or compartment where members of the crew eat their meals, a dining room in which officers eat their neals is called a wardroom messroom.
The intersection of successive vertical lines through the centre of buoyancy as a ship is heeled progressively. For small inclinations the metacentre is on the centreline of the ship.
A plot showing how the metacentre and centre of buoyancy change as draught increases.
Metacentric height (GM)
The vertical separation of the metacentre and the centre of gravity as projected on to a transverse plane.
That part of a ship adjacent to the midship section. When it has a uniform cross section throughout its length, with its water lines parellel to the center line, it is called the parellel middle body.
The middle of the vessel.
Midship area coefficient (CM)
One of the coefficients of fineness. It is the ratio of the underwater area of the midship section to that of the circumscribing rectangle .
The longest beam transverse or longitudinal of the midship of a vessel.
The frame at midship, which is the largest on the vessel.
Fully dimensioned sectional drawing of both hull and superstructure principal structural members at the midships station.
A pattern or template. Also a shape of metal or wood over or in which an object may be hammered or pressed to fit.
The large enclosed floor wher the lines of a vessel are laid out and the molds or templates made.
The greatest breadth of a vessel, measured from the heel of frame onone side to heel of frame on the other side.
The distance from the top of the keel to the top of the upper deck beams amidships at the gunwale.
A datum line from which is determined the exact location of the various parts of a ship. It may be horizontal and straight as the molded base line, or curved as a molded deck line or a molded frame line. These lines are determined in the design of a vessel and adhered to throughtout the construction. Molded lines are those laid down in the mold loft.
The edge of a ship’s frame which comes in contact with the skin , and is represented in the drawings.
A breakwater used as a landing pier.
A knot worked into the end of a heaving line (for weight).
A flying bridge on top of a pilothouse or chart house.
A curved bar fitted ti the upper, after end of a rubber, and used as an attachment for the rubber pendants.
Securing to a dock or to a buoy, or anchoring with two anchors.
Cable or hawse lines used to tie up a ship.
An opening through which hawse lines pass.
A hole cut in any material to receive the end or return of anoter piece.
Mother Carey’s chickens
Small birds that foretell bad weather and bad luck.
Greatest breadth of a hull measured between inner surfaces of the side shell plating.
Small stuff seized across a hook to prevent it from unshipping (once hooked, mousing keeps the hook on).
A large, flat bottomed boat used to carry the mud from a dredge.
The vertical bar dividing the lights in a window.
An anchor without stock and shaped like a mushroom.
Nantucket sleigh ride
A term for what frequently happened to Nantucket whalers when they left the whaling ship in a small boat to go after a whale. If they harpooned the whale without mortally wounding it, the animal took off with the whaleboat in tow.
Unit of distance used in marine navigation. (International nautical mile = 1.852 km. 6076.12 ft, 1.1508 land miles.) The international nautical mile is equivalent to the average linear distance over 1 minute of latitude arc at 45° latitude at sea level.
The mythical god of the sea.
Net registered tonnage
A formula-derived measure of the internal (enclosed) volume in a vessel except spaces for machinery, navigation and accommodation. Net tonnage is always less than the gross tonnage.
The cubical space available for carrying cargo and passengers.
A rope network.
A term applied to a door that is not constructed to prevent water under pressure from passing through.
Not under command
Said of a vessel when unable to maneuver.
Not under control
Same as not under command.
Material used for caulking the seams of vessels and made from the loose fibers of old hemp rope.
OBO [Oil-bulk ore (carrier)]
Vessel designed for the transportation of oil and/or bulk ores.
Off and on
Standing toward the land and off again alternately.
Officer of the watch
The officer in charge of the watch.
Are given in feet, inches and eights of an inch. They are taken from large body plans and given the horizontal distance from the center line to the molded frame line on each of the water lines, which are usually spaced 2′-0” apart. Offsets also give the height of each buttock above the baseline at each frame< the heights of decks from the base line, the location of longitudinals and stringers by half breadths and heights, or heights above the base line intersecting the molded frame lines, and all dimensions such that the entire molded form of a ship and the location of all membersof the structure are definitely fixed.
Dimensional co-ordinates of a hull form, (referenced to the moulded baseline, centreline and transom or AP) usually presented in tabular format.
A molding with a concave and convex outline like an S.
A bag filled with oil and triced over the side for making a slick in a rough sea (to keep seas from breaking).
Vessel designed for the transportation of liquid hydrocarbons in bulk.
Having the property of resisting the passage of oil.
A partition of plating reinforced where necessary with stiffering bars and capable of preventing the flow of oil under pressure from one compartment to another. The riveting must be closer spaced than in watertight work and special care must be taken with the calking.
A piece of heavy bar iron bent to the form of a Z. One leg of the Z is bolted to the material that is to be drilled, and the drill top placed under the other leg and adjusted so the “old man” holds the drill against the material.
On or in a ship.
On the upper deck, in the open air.
Said of a vessel when the depth of water can be measured by the lead (within the 100 fathom curve).
The beginning grade for members of the deck department. The next step is able bodied seaman.
The lowest deck in a ship.
Out of trim
Not properly trimmed or ballasted (not on even keel; listing).
In a direction towards the side of the ship.
Away from the keel or center of a vessel on either side.
A plan representing the longitudinal exterior of a vessel, showing the starboard side of the shell, all deck erections, masts, yards, rigging, rails, etc.
The extreme deck fore and aft measurement of a vessel.
Outside, over the side of a ship into the water.
Same as counter
Get gear in condition for use; to separate the blocks of a tackle to lengthen the fall (ready for use again).
Said of a vessel when she is passing or overtaking another vessel.
The combination of a substance or element like wood, iron, gasoline, etc, with oxygen. The process is fundamentally the same whether wood is consumed with fire or iron is turned into rust (iron oxide). In welding the oxygen of the air forms an oxide with the molten metal, thus injuring the quality and strength of the weld.
The name of a plate that fits in the curve at the meeting of the shell plating with the top of the stern post and which is fastened there to.
Men who fit lamp wicking, tarred felt or other material between parts of the structure to insure water or oil tightness.
A fitting having an eye integral with a plate or base in order to distribute the strain over a greater area and to provide ample means of securing. The pad may have either a “worked” or a “shackle” eye, or more than one of either or both. The principal use of such a fitting is that is affords means for attaching rigging, stoppers, mlocks, and other movable or portable objects. Pas eyes are also known as lug pads.
A short piece of rope secured in the bow of a small boat used for making her fast.
The transverse beams that tie the painting frames together.
The frames in the fore peak, usually extra heavy to withstand the panting action of the shell plating.
A pair of cargo masts stepped on eith side of the center line, with their heads connected by spans.
One of the interior shores for steadying the neams of a ship while building.
A flat wooden or plastic platform onto which cargo may be strapped or lashed which simplifies handling via cranes and forklift vehicles.
Cargo vessel specially designed or adapted for the transportation of pallet-borne cargoes.
Palm and needle
A seaman’s sewing outfit for heavy work.
category of vessels notionally at the dimensional limits for transiting the Panama canal.
The pulsation in and out of the bow and stern plating as the ship alternately rises and plunges deep into the water.
Horizontal deep-web side structural member used for strengthening bow structure prone to panting loads.
Midship portion of a hull within which the longitudinal contour is unchanged.
A water plane with a protecting wing placed on bottom forward end of the keel stem. Also a special type of waterkite which, when towed wth wire rope from a fitting on the forefoot of a vessel, operates to ride out from the ship’s side and deflect mines which are moored in the ppath of the vesse;, and to cut them adrift so that they will rise to the surface where they may be seen and destroyed.
A term applied to a bulkhead that extends only a portion of the way across a compartment. They are generally erected as strength members of the structure.
Similar pieces of steel plate, angles or wood timbers used to strengthen and support the mast where it passes through a deck, or placed between deck beams under machinery bed plates for added support.
Pass a line
To reeve and secure a line.
Pass a stopper
To reeve and secure a stopper (hold a strain on a line while transferring it).
Pass down the line
Relay to all others in order (a signal repeated from one ship to the next astern in column).
Pass the word
To repeat an order for information to the crew.
A vessel which carries more than 12 passengers.
To fill the seams of a vessel with pitch.
To turn the bow away from the wind; to pay the crew.
To slack out a line made fast on board (let it out slowly).
Paying out, slackening away on a rope or chain. Also the operation of filling seams between planks after calking, with melted pitch or marine glue, etc.
See Fore Peak and after Peak.
Tank in the forward and after ends of a vessel. The principal use of peak tanks is in trimming The ship. Their ballast is varied to meet required changes in trim. Should the after hold be empty, the vessel would ride so high that the propeller would lie half out of water and lose much of its efficiency. Filling the afer peak tank forces the propeller deeper into the water.
To round off or shaoe an object, smoothing out burrs and rough edges. (Nown) The lesser head of a hammer. It is termed ball when it is spherical, cross when in the form of a rounded edge ridges at right angles to the axis of the handle, and sraight when like a ridge in the plane of the handle.
A hinged hook held closed by a ring and used to provide the quick release of an object which it holds.
A length of rope, usually having a thimble or block spliced into the lower end for hooking on a tackle.
Ballast material (usually solid material) which cannot be discharged or transferred by pump or by other means and which is used for attaining design draft and trim.
A measure of the free volume in a compartment defining the maximum amount of water that can enter as a result of damage. It will be less than unity because of stiffeners and equipment in the space.
A line perpendicular to the keel line, drawn tangent to the after contour of the stern.
Pier head jump
Making a ship just as it is about to sail.
A pointed spar driven into the bottom and projecting above the water; when driven at the corners of a dock, they are termed fender piles.
Vertical column used to provide support to overhead deck structure.
Vertical columns supporting the decks. Also called stanchions.
A power or sailing boat used by pilots (men who have local knowledge of navigation hazards of ports).
A house designed for navigational purpose. It is usually located forward of the midship section and so constructed as to command an unobstructed view in all directions except directly aft along the center line of the vessel, where the smokestack usually interferes.
A small rudder fastened to the after part of the regular rudder, which by a mechanical attachment pulls the main rudder to either side.
The metal axle of a block upon which the sheave revolves.
A metal pin secured to the rubber, which is hooked downwardinto the qudgeons on the stern post, and affords an axis of oscillation as the rubber is moved from side to side for steering.
Vertical pins or bolts that serve as a pivot axis for a rudder.
Vessel designed for the laying of pipelines on the sea bed.
A steel deck fitting consisting of a vertical post with angled bracket(s) on one side, welded to a doubler plate, which is welded on the deck of a vessel to restrain the movement of cargo, such as pipe.
A tar substance obtained from the pine tree and used in paying the seams of a vessel. Motion of vessel.
The oscillatory vertical motion of a vessel forward and aft in a seaway.
Areas of corrosion.
To braid; used with small stuff.
A drawing prepared for use in building a ship.
Broad planks used to cover a wooden vessel’s sides, or covering the deck beams.
A plate that requires heating in order to shape it as required.
A partial deck.
Deck which does not contribute to the overall longitudinal strength of a vessel.
The steel plates which form the shell or skin of a vessel.
Freedom of movement.
The primary loadline mark which is a circle intersected by a horizontal line accompanied by letters indicating the authority under which the loadline is assigned.
A wooden wedge fitting into a drainage hole in the bottom of a boat for the purpose of draining the boat when she is out of water.
Supports for a shaft (such as the propeller shaft).
A ship is said to plunge when it sinks bow or stern first through loss of longitudinal stability.
To taper the end of a rope; one of the 32 divisions of the compass card. To head close to the wind.
The property possessed by electrified bodies by which they exert opposite forces in opposite directions. The current in an electrical circuit passes from the positive to the negative pole. In welding, more heat is generated on the positive pole than on the negative one, so that the welding rod is generally made the negative electrode.
The structure or raised deck at the after end of a vessel.
A partial deck at the stern above the main deck, derived from the Latin “puppio” for the sacred deck where the “pupi” or doll images of the deities were kept.
Raised short deck at the stern.
An opening in a ship’s side, such as an air port, or cargo port.
Those pieces of timber which are fixed perpendicularly between the ship’s bottom and the bilgeways at the foremost and aftermost parts of the ship, to support her in launching.
Same as port hole.
(1) Pertaining to the left-hand side of a vessel. (2) Term used for small windows in the marine context.
An opening in the side plating, planking, or bulwark for the purpose of providing access through ehich people may board or leave the ship or through which cargo may be handled.
An opening in the ship’s shell plating.
A shutter for closing a port hole in stormy weather. It is hung by top hinges.
Port of Registry
Port in the country under whose flag a vessel is legally registered.
The left hand side of the ship looking forward.
Port State Control
The examination of vessels for compliance with IMO Conventions and resolutions by state authorities.
Pouring oil on troubled waters
Heavy-weather practice of pouring oil on the sea so as to form a film on the surface, thus preventing the seas from breaking. To smooth out some difficulty.
A permit by the port doctor for an incoming vessel, being clear of contagious disease, to have the liberty of the port.
A rope used for additional support or for additional securing, e.g., preventer stay.
A small hand punch used to make a very small indentation or prick in a piece of metal.
One which has the right of way.
Tanker designed for the transportation of a variety of hydrocarbon and chemical liquids with elaborate pumping and safety systems.
A blast of from 4 to 6 seconds’ duration.
A propulsive device consisting of a boss or hub carrying radial blades, from two to four in number. The rear or driving faces of the blades form portions of an approximately helical surface, the axis of which as the center line of the propeller shaft.
Bladed propulsor generating thrust via the creation of hydrodynamic lift forces in the direction of vessel motion.
The arched section of the hull above the propeller.
The part of the bow from the load water line to the top of he bow.
A manoeuvre used to demonstrate the directional stability of a ship.
A pipe to convey water from the pump discharge through the ship’s side.
A small punch used to indent a piece of metal for centering a drill.
A rectangular flat- bottomed boat used by vessels for painting the ship’s side and general use around the ship’s water line, fitted with oar-locks on each side and usually propelled by sculling.
A tackle (blocks and falls).
Tug designed for or engaged in pushing barges from behind.
Put to sea
To leave port.
Pressure vacuum relief valve; a valve which automatically regulates the pressure or vacuum in a tank.
Pressure vacuum relief valve; a valve which automatically regulates the pressure or vacuum in a tank.
A fitting on the rubber head to which the steering chains are attached.
Quadrant-shaped flat plate assembly mounted horizontally on top of a rudder stock for to which steering cables/chains are attached in vintage vessels or small craft.
Restricted or prohibited intercourse due to contagious disease.
That portion of a vessel’s side near the stern.
A side of a ship aft, between the main midship frames and stern. Also a sidde of a ship forward, between the main frames and the stem.
A term applied to the after portion of a weather deck. In a warship that portion allotted to the use of the officers.
Full-width raised hull section and deck extending from the aft shoulder to the stern.
A sea on the quarter (coming from a side of the stern).
Living spaces for passengers or personnel. It includes staterooms, dining salons, mess rooms, lounging places, passages connected with the foregoing, etc., individual stations for personnel for fire or boat drill, etc.
A vessel’s station bill showing duties of crew.
An artificial wall or bank, usually of stone, made toward the sea at the side of a harbor or river for convenience in loading and unloading vessels.
A depression or offset designed to take some other adjoining part, as for example the rabbet in the stem taking the shell plating.
The upper edge of the bulwarks.
Horizontal parallel tubing forming a safety barrier at edges of decks.
The forward pitch of the stem. The backwark slope of the stern.
A bow protruding undernearth the water line considerable forward of the fore-castle deck.
Hinged platform permitting the loading/discharge of vehicles or movement between decks of vehicles aboard Ro-Ro vessels.
The maximum distance a vessel is capable of attaining at its normal
The stove situated in the galley which is used to cook the food. The heat may be generated by coal, fuel oil, or electricity.
A short length of small rope “ratline stuff” running horizontally across shrouds, for a ladder step.
The horizontal distance that a crane or lifting appliance can cover, measured from its axis of rotation.
A steel rod which connects an above deck valve handle to a below deck valve.
A steel rod which connects an above deck valve handle to a below deck valve.
Enlarging a hole by the means of revolving in it a cylindrical slightly tapered tool with cutting edges running along its sides.
To reduce the area of a sail by making fast the reef points (used in rough weather).
To pass the end of a rope through any lead such as a sheave or fair lead.
Vessel designed for the transportation of refrigerated perishable
The ship’s certificate determining the ownership and nationality of the vessel. Relieving tackle. A tackle of double and single blocks rove with an endless line and used to relieve the strain on the steering engine in heavy weather or emergency.
Any clearance allowed back of the cutting edge to reduce friction whether on top, bottom or wall of the tread.
Vessel designed for oceanographic or fisheries research.
Watertight volume of a vessel above the waterline.
An angle bar placed with its heel against another angle additional strength. The flanges of deck stiffeners always bace outboard.
Rigid inflatable boat.
A longitudinal strtip of timber following the curvature of a vessel and bolted to its ribs to hold them in position and give stability to the skeleton while building.
To lie at anchor; to ride out; to safely weather a storm whether at anchor or underway.
System(s) employing active hydrodynamic foils or deflectors installed to vary the attitude and vertical motions of the hull in high-speed vessels.
Any frame riveted or welded on another frame for the purpose of stiffening it.
Bed plates set on top of the center keelson, if fitted, for the pillars to rest on.
A general description of a vessel’s upper works; to fit out.
A term used collectively for all the ropes and chains employed to support the masts, yards, and booms of a vessel, and to operate the movable parts of same.
To return to a normal position, as a vessel righting after heeling over.
A bolt fitted with a ring through its eye, used for securing, running, rigging, etc.
A disturbance of surface water by conflicting current or by winds.
Rise and shine
A call to turn out of bunks.
Rise of bottom
The floor frames which rise fore and aft above the level of themidship floors.
A metal pin used for connecting two or more pieces of material by inserting it into holes punched or drilled in the pieces. The end that bears a finished shape is called the head and the end upon which some oretation is performed after its insertion is called the point. Small rivets are “driven cold”, i.e. without heating, and large ones are heated so that points may be formed by hammering.
A term applied to the distance between the centers in a row of rivets. This distance usually consists of a multiple of the rivet diameter, and depends on whether oiltightness, watertightness or strenght is to be the governing requirement.
A term applied to two or more rows of rivets that have their centers opposite each other. A line drawn perpendicular to the edge of the plate through the center of a rivet in one row will also pass through the centers of the corresponding rivets in the other rows.
That geographical belt located approximately in 40 degrees south latitude in which are encountered the prevailing or stormy westerlies.
Motion of the ship from side to side, alternately raising and lowering each side of the deck
A block, ring, or other fitting through which passes a line or the running rigging on a ship to prevent chafing.
Same as bilge keel.
Vessel designed with combined Ro-Ro and passenger capacity.
Roll-on Roll-off. Method of cargo transfer between vessel and shore in which cargo is driven on/off using fork-lift, primemover/ trailer combinations, etc.
A protective railing on the hull of a vessel which is used for fendering.
A protective railing on the hull of a vessel which is used for fendering.
A swinging flat frame hung to the stern post of a ship, by which the ship is steered.
The bands that extend on each side of a rudder to help brace and tie ii into the pintles.
The chains whereby the rudder is fastened to the stern quarters. They are shackld to the rudder by bolts just above the water line, and hang slack enough to permit free motion of the rudder. They are used as a precaution against losing a rudder at sea.
The flange which ties the main part of the rudder to the rudder stem. It may be horizontal or vertical.
A frame within the inner shell, bolted through the letter into the main frame and shell, for the purpose of stiffening the rudder.
The vertical post in the stern of a vessel on which the rudder hangs.
Vertical shaft connecting the rudder to the steering actuating system.
Fitting to limit swing of the rudder.
Rudder truck or case
The well in the stern which holds the rudder stock.
The narrowing sides of a vessel aft where they meet at the hooding-ends.
To collide with a vessel head on.
Those lights required to be shown at night aboard a vessel or a tow while underway.
Those lights required to be shown at night aboard a vessel or a tow while underway.
Sailors’ term for an old ship that needed a lot of paint and repairs.
Anode of zinc attached to the immersed parts of a hull to prevent deterioration of the hull steel through electrochemical reaction.
Safety of Life at Sea (SOLAS)
A statutory regulation of IMO dealing with the safety of life at sea.
Said of a ship which has been strained so that the bottom drops lower in the middle than it is at stem and stern. Opposite of hogged.
A ship is said to sag if the forces acting on it make it bend longitudinally concave up. Sagging is the opposite of hogging.
Sailing other than close; hauled or into the wind (wind astern).
A nautical guy, often a negative connotation.
To save a vessel or cargo from total loss after an accident; recompense for having saved a ship or cargo from danger.
Large powerful and manoeuvrable vessel designed to tow and assist vessels needing assistance due to grounding, sinking or fire.
Short heavy masts used as boom supports, and often used for ventilators as well.
Search And Rescue Transponder. A SART is a self contained, waterproof radar transponder intended for emergency use at sea. The radar-SART is used to locate a survival craft or distressed vessel by creating a series of dots on a rescuing ship’s radar display. A SART will only respond to a 9 GHz X-band (3 cm wavelength) radar. It will not be seen on S-band (10 cm) or other radar.
To climb up. A formation of rust over iron or steel plating.
A term applied to the dimensions of the frames, girders, plating, etc., that go into a ship’s structure. The various classification societies publish rules from which these dimensions may be obtained.
Set of dimensions of a vessel’s structure. (Structural dimensions.)
A method of cutting away two pieces so that they fit smoothly into each other to make one piece. They are fastened together by welding, bolting, riveting, etc.
Self-Contained Breathing Apparatus. Such an apparatus consists of a suitable face mask, combined with a hose and source of fresh air, generally in the form of a tank of compressed air. The SCBA may be incorporated into a full-body protection suit. It is important to recognise that use of a SCBA is not trivial, and they are not designed to be worn by those without training.
A large body of fish.
Another term for a deck cargo barge having a hull design of a flat bottom, square ended rakes, and usually with a deck cargo bin.
A light bulkhead fitted between engine and boiler rooms, designed to keep dust and heat out of the engine room. Often built around the after ends of boilers.
A large section of flooring in the mold loft in which the lines of the body are cut with a knife. Used in making molds of the frames, beams, floor plates, etc.
Any opening or tube leading from the waterway through the ship’s side, to carry away water from the deck.
A temporary canvas hose attached to the outside of a scupper hole, and reaching to the water, to conduct the water clear of the ship’s side.
A projection on the outside of the vessel to allow the water to drop free of the ship’s side.
A hole longer than an ordinary scupper with vertical bars, placed on the side of the ship at the deck line to allow deck wash to flow over the side of the vessel. Also called freeing port.
A pipe connected to the scupper on the decks, with an outlet through the side plating just above the water. The water thus diverted from the deck does not discolor the ship’s side plating or damage the paint.
Openings in the side of a ship to carry off water from the waterways or from the drains.
A small opening, usually circular in shape, and generally fitted in decks to provide access as a manhole or for stowing fuel, water and stores. A cover or lid is fitted so that the scuttle may be closed when not in use. Also applied to the operation of opening a sea valve or otherwise, allowing the sea to enter a ship for the purpose of sinking her.
The designation for a container of the supply of drinking water for the use of the crew.
Scuttle butt story
An unauthoritative story (a tall story).
A drag (drogue) thrown over to keep a vessel to the wind and sea.
A sailor’s trunk; the intake between the ship’s side and a sea valve.
An old sailor.
Capable of going to sea.
A seaman who is prone to argue, especially against recognized authority (big mouth).
A line leading from forward on the ship and secured to a forward inboard thwart of the boat in such a way as to permit quick release.
Butt-strap of a seam.
Capable of putting to sea and able to meet sea conditions.
(1) General term for an extruded or fabricated structural member. [Alt profile.] (2) Transverse vertical plane through the hull perpendicular to the centreline.
To make fast; safe; the completion of a drill or exercise on board ship.
Secure for sea
Prepare for going to sea, extra lashing on all movable objects.
To bind with small rope.
Flag signaling with the arms.
A bolt used as a drift to force another bolt out of its hole.
Bar of soft iron used on the bending slab to bend frames to the desired shapes.
Set the course
To give the steersman the desired course to be steered.
To tighten the nut on a bolt or stud.
Set up rigging
To take in the slack and secure the standing rigging.
Reinforcing pilling in the ground beneath the ways.
To lower, sink deeper.
A link with a bolt fastened through its eyes, used for fastening chains and eye loops together.
Long, round, heavy forging connecting engine and propeller.
Covered tunnels within a ship through which the tail shafts pass.
A flange on the end of a shaft section connecting two sections by bolts.
A pipe which pases through a hole in the stern post and through frames with a circular housing. In it are bearings on which the propeller shaft rotates.
A brachet supporting the after end of the propeller shaft and the propeller in twin or multiple screwed vessels having propeller shafts fitted off from the center line.
Same as shaft Alley.
Shake a leg
An order to make haste.
A cruise of a new ship for the purpose of testing out all machinery, etc. Shank. The main piece of the anchor having the arms at the bottom and the Jew’s harp at the top.
The practice of obtaining a crew by means of force. Crews were hard to get for long voyages, and when the unwilling shipmate regained consciousness, he found himself bound for some remote port, such as Shanghai. One who is forced to do something against his will.
Long bar of constant cross section such as channel, T-bar, angle bar, etc.
Shape a course
To ascertain the proper course to be steered to make the desired point or port. Shark’s mouth. The opening in an awning around the mast.
Consists of cutting, bending and forming astructural member.
Usually two or more timbers or spars erected in the shape of an A-frame with lower ends spread out and upper ends fastenes together, from which lifting tackle is suspended. Used fro raising and moving heavy weights where a crane or derrick is not available.
Large machine for cutting plates and shapes.
The wheel of the block over which the fall of the block is rove.
Upward longitudinal curvature of the upper deck.
A vertical lngitudinal midship section of a vessel, showing plan, elevation and end view, on which are projected various lines as follows: Water line, diagonal line, buttock and bow lines, mainbreadth lines, top-breadth lines, top side sheer lines.
A rail surrounding a ship on the outside, under the gunwale, on small vessels called guard rail.
The uppermost strake (line) of side shell plating immediately adjacent to the strength deck.
The rope used to spread the clew of head sails and to control the boom of boom sails.
The casing of a block within which the sheave revolves.
A plan showing the shapes and sizes of all plates of the shell plating.
Point on the frames showing wher the edges of the shell plates come.
A term applied to a deck fitted from stem to stern ona relatively light superstructure. The main deck.
Shift of butts
A term applied to the arrangement of the butt joints in plating. These joints in shell plating should be so shifted that the adjacent strakes of plating have their butts at least two frame spaces apart.
A portable beam fitted in a hatchway for the purpose of supporting the hatch covers. The ends of the beams are fitted in slotted carriers attached to the inside of the hatchway coamings.
A piece of metal or wood placed under the bedplate or base of a machine or fitting for the purpose of truing it up. Also applied to pieces placed in slack spaces behind or under frames, plates or planks to preserve a fair surface.
To enlist; to send on board cargo; to put in place; to take on board.
An attempt to guide a ship into areas where it will experience less severe weather and so reduce passage times.
See Log Book
Ships time was counted by the half hour, starting at midnight. A half hour after twelve was one bell; one o’clock, two bells; and so on until four o’clock, which was eight bells. The counting then started over again, with 430 being one bell.
A piece of plank put under a shore where there is no groundway.
One of the many wooden props by which the ribs or frames of a vessel are external supperted while building, or by which the vessel is held upright on the ways.
When the scope of chain is slightly greater than the depth of water.
American ton (2000 lbs). 0.9072 tonnes.
Without sufficient crew.
A short length of chain, usually 15 fathoms (90 feet). (Method of measuring chain.)
Shove in your oar
To break into a conversation.
Side stays from the masthead to the rail..
Moderate sized tanker designed for the regular short-haul transport of oil between FPSO vessels or single point mooring buoys and coastal refinery terminals.
A beam placed on the side of the hull about two-thirds the distance from the center line to the bilgeway. This ia uesd as a stiffener logitudinally for the flat bottom of a vessel.
The red and green running lights, carried on the port and starboard sides respectively, of vessels under-way.
The edges of plating that are visible are called sight edges. The sight edge is on the outside of the shell, on the tops of decks and inner bottom plating, and on the opposite side from the stiffeners on bulkheads. The edge that is covered is called the landing edge.
To call out.
Two iron flatsided hooks reversed to one another.
The after part of the keel, upon which the stern post rests.
Beams sometimes fitted over the decks for the stowage of heavy boats or cargo.
The plating of a ship. The inside skin is sometimes called the ceiling, the outside skin the case. It consists of steel plates laid in alternate inside and outside strakes.
An erection built on a deck, having glass lights in its top and fitted over an opening in the deck for the purpose of admitting light and air to a compartment below.
The part of a rope hanging loose; the opposite of taut.
The condition of the tide when there is no horizontal motion.
The impact of the hull, usually the bow area, with the sea surface when in waves.
One of the structures on each side of and parallel to the keel, supporting the crandle under the bilgeways on which the vessel rests in launching. The sliding ways form the inclined plane down which the vessel slides, made of planks laid on blocks of wood.
To let go by unshackling, as a cable.
Stock of merchandise, such as clothing, tobacco, etc., maintained aboard merchant ships for sale to the crew
An opening in the lower part of a bulkhead fitted with a sliding watertight gat or door having an operating rod extending to the upper deck or decks. These openings are useful in center line bulkheads, as in case of damage to one side of the ship the water may be quickly admitted to the other side before the ship is dangerously listed.
White-lead and tallow used on standing rigging.
Snappy, seamanlike; a smart ship is an efficient one.
A metal chimney or passage through which the smoke and gases are led from the uptakes to the open air.
Pipe lines to a compartment for smothering a fire by steam or by a chemical.
Society of Naval Architects and Marine Engineers (USA).
Handle that can be operated from both sides of a watertight door.
To cut a sharp bevel on the end of a stiffener or beam.
To check suddenly.
To twist a plate into an uneven warped shape on a mold.
A plate put on over a break or hole, and secured with tap bolts. It is made watertight with a gasket such as canvas saturated in red lead.
A plate fitted to the top of a foundation to which the base of a machine is bolted. Also a small plate fitted at the end of a stanchion.
A plate fitted to the top of a foundation to which the base of a machine is bolted. Also a small plate fitted at the end of a stanchion.
To measure the depth of the water with a lead. Also said of a whale when it dives to the bottom.
Sound out a person
To obtain his reaction to something.
Measuring the depth of water or other liquid.
Measured depth of liquid contents in a tank.
Vertical pipe in oil or water tank, used to guide a sounding device when measuring the depth of liquid in tank.
An oil-skin hat with broad rear brim.
The distance between any two similar members, as the span of the frames. Also used to describe the length of a member between its supports, as the span of a girder.
A form of open-head wrench.
A pole used for a hoist or in scaffolding.
The radio operator.
Self-polishing copolymer antifouling paint.
To communicate with a vessel in sight.
The ratio of the weight of a given volume of any substance to the weight of an equal volume of distilled water, and is found by dividing the first weight by the second. Since the distilled water weights approximately 62.4 pounds per cubic foot, any substance, a cubic foot of which weighs less than this, has a specific gravity of less than one, and will float on water. Any substance of greater weight per cubic foot has a specific gravity of more than one and will sink>
Specified details relating to the performance, operating conditions, construction and quality of an engineered item.
A single casting containing the bearings for and supporting the ends of the propeller shafts in a twin-screw vessel. It consists of arms of pear-shaped section extending outboard from each side of the center line of the ship to bosses, taking the bearings of the propeller shafts. Used in large metchant vessels in place of shaft struts or brackets.
The curve of a plate or strake as it narrows to a point.
To empty the wind out of a sail.
A method of uniting the ends of two ropes by first unlaying the strands, then interweaving them so as to form a continuous rope.
An addition to the side of a vessel that is outside its normal hull and which provides added deck space and/or greater flotation stability.
An addition to the side of a vessel that is outside its normal hull and which provides added deck space and/or greater flotation stability.
Indicates that an annular bacing has been made about a bolt hole to allow a nut or head to seat evenly.
Beam or beam structure temporarily attached to and spanning the extremes of an item being lifted.
Usually of the best wire hawsers; one of the first lines sent out in mooring. “Springs in and springs out” a vessel.
A steel or wooden post or pile that is placed vertically through a well in the hull of a vessel and which, when lowered to the bottom of the waterway, anchors the vessel.
A steel or wooden post or pile that is placed vertically through a well in the hull of a vessel and which, when lowered to the bottom of the waterway, anchors the vessel.
A casing which is attached to or passes through the hull of a vessel through which a spud is raised or lowered.
A casing which is attached to or passes through the hull of a vessel through which a spud is raised or lowered.
A sudden and violent gust of wind.
A frame having no bevel on its flange. A midship frame
A deck dryer composed of a flat piece of wood shod with rubber, and a handle. Stanchions. Wooden or metal uprights used as supports (posts).
Protruding hydraulically-activated fin(s) which reduces roll amplitude through oscillatory action creating alternating lift vectors phased to counter roll.
Tendency of the ship to remain upright.
The ship’s funnel or smokestack.
To zigzag a line, or row of rivet holes, etc.
Upright supports fastened together with horizontal and diagonal braces forming supports for planks which form a working platform.
An iron post or pillar for supporting the decks.
A preparatory order
The magnetic compass used by the navigator as a standard.
That part of a line or fall which is secured.
That part of the ship’s rigging which is permanently secured and not movable, such as stay, shrouds, etc.
Collars, forged of angle bars, to fit around continuous members passing through bulkheads or decks for watertightness.
The right side of a vessel looking forward.
A private room or cabin for the accommodation of passengers or officers.
Structural loading of constant magnitude and application.
The posted bill showing stations of the crew at maneuvers and emergency drills.
Still, seaworthy, able.
A rope of hemp, wire or iron leading forward or aft for supporting a mast.
The rope, whether hemp or wire, that support the lower masts, topmasts, topgallant masts, etc., in a fore and aft direction.
An order to hold a vessel on the course she is heading.
Stealer or steeler
The foremost or aftermost plate in a strake, which is dropped short of the stem or stern post of a vessel.
The slowest speed at which a vessel steers.
Compartment above the rudder(s) containing the vessel’s steering actuation system(s).
A term applied to the steering wheels, leads, steering engine and fittings by which the rudder is turned.
Steering gear flat
The deck above the stern overhang, on which the rudder steering mechanism is installed.
The wheel operating the steering gear and by which the vessel is steered.
The upright post or bar of the bow.
The forward end of the keel, into which the stem is fitted.
Stem the tide
Stemming the tide or sea means to head the vessel’s bow directly into the current or waves. Overcome adverse circumstances.
Same as poppets.
The after part of the vessel.
An anchor carried at the stern.
Watertight horizontally-hinged door integral to the transom on a stern-loading Ro-Ro vessel.
Large casting attached to after end of keel to form ship’s stern. Includes rudder post, propeller post, and aperture for the propeller.
A pipe leading to the opening at the side of poop deck for passing through of cables, chains, etc., for mooring purposes.
The after post to which the rudder is hinged and placed on the skeg, with sufficient clearance for the propeller to revolve.
Stern- (transom) mounted hinged platform located to permit the loading/discharge of vehicles aboard a Ro-Ro vessel.
A propulsor installed near the stern to provide transverse a thrust component enhancing manoeuvrability.
The bearing which supports the propeller shaft where it emerges from the ship. A cast iron or steel sylinder, fitted with brass bushings which are lined with lignum vitae or white metal bearing surfaces, upon which the propeller shaft, enclosed in a brass sleeve, rotates.
The reinforced, vertical shell plating which connects the stern rake bottom to the rake deck of a barge.
The reinforced, vertical shell plating which connects the stern rake bottom to the rake deck of a barge.
A professional cargo loader and unloader.
An angle bar or stringer fastened to a surface to strengthen it and make it rigid.
A wood plug driven through a scarf joint to stop water from leaking into the ship. The term is also applied to pieces of canvas soaked in oil, red lead, etc., placed between the faying surfaces of plates and shapes where water or oil is apt to work its way through.
A short length of rope secured at one end, and used in securing or checking a running rope, e.g., deck stopper, boat fall stopper, etc.
The space provided for stowage of provisions or other materials.
An announced warning of an approach of a storm.
To put in place.
A person illegally aboard and in hiding.
A continuous line of plates on a vessel’s side, reaching from stem to stern.
A number of yarns, twisted together and which in turn may be twisted into rope; a rope is stranded when a strain is broken; rope may be designated by the number of strands composing. Rope is commonly three-stranded. A vessel run ashore is said to be stranded.
A ring of rope made by splicing the ends, and used for slinging weights, holding the parts of a block together, etc. A rope, wire or iron binding, encircling a block and with a thimble seized into it for taking a hook. Small straps used to attach a handybilly to the hauling part of a line.
A rudder with a bullnosed round forward edge which tapers regularly to a thin after edge.
A large beam or angle fitted in various parts of the vessel to give additional strength. Depending on their location, stringers are known as bilge stringers, side stringers, hold stringers, etc.
A fore-and-aft member of deck plating which strengthens the connection between the beams and the frames, and keeps the beams square to the shell.
A simplified theory for calculating ship motions.
A light spar set fore and aft on a boat, serving as a spread for the boat cover.
Support structure (with streamlined cross-section) for propeller shafting in a multi-screw vessel. [Alt shaft bracket.]
A term applied to cargo ships which are just able to transit the Suez Canal.
(1) General term for sections of a vessel constructed on and above the upper or main decks of a vessel. (2) A more restrictive term under the International Convention on Load Lines, (1966) detached enclosed structure on the freeboard deck and extending transversely to within 4% of the breadth from the vessel’s sides.
To ease a line to prevent it from parting or pulling, meanwhile holding the strain.
To bear or force down. An instrument having a groove on its under side for the purpose of giving shape to any piece subjected to it when receiving a blow from a hammer.
Sink by filling with water.
A partial bulkhead used for the same purpose as a swash plate.
Swash bulkhead (plate)
Longitudinal or transverse perforated bulkhead (baffle) fitted in a tank to reduce the surging of the contents.
Plates fixed in tanks to prevent excessive movement of the contained liquid.
A large wave.
The evolution of swinging a ship’s head through several headings to obtain compass errors for the purpose of making a deviation table.
Swing of the boom from one side of the ship to the other when the tack is changed.
Safe working load; certified load limit applied to lifting appliances and gear.
Any combination of ropes and blocks that multiplies power. A single whip, improperly called tackle, gives no increase in power, but a change in direction of the power but a change in direction of the power applied.
The log mounted on the taffrail and consisting of a rotator, a log line and recording device (to measure distance run through the water).
Aftermost section of the propeller shafting, carrying propeller.
Take a turn
To pass a turn around a belaying pin or cleat.
To lower and furl the sails.
Taking on more than you can carry
Loaded with more cargo than a ship can safely navigate with. Drunk.
The plating laid on the bottom floors of a ship, which forms the top side of the tank sections or double bottom.
A ship designed to carry various types of liquid cargo, from oil and gasoline to molasses, water, and vegetable oil.
Compertments for liquids or gases. They may be formed by the ship’s structure as double bottom tanks, peaktanks, deep tanks, etc., or may be independent of ship’s structure and installed on special supports.
Heavy canvas used as a covering.
With no slack; strict as to discipline.
A rolled shape, generally of mild steel, having a cross section shaped like the letter “T”. In ship work it is used for bulkhead stiffeners, bracket and floor clips, etc. The size is denoted by dimensions of its cross section and weight per running foot.
Means of signalling from bridge to engine room, etc.
A pattern made in themold loft from wood strips or heavy paper.
The end of a piece of wood cut into the form of a rectangular prism, designed to be set into a cavity of a like form in another piece which is termed mortise.
The head of water corresponding to the pressure prescribed as a test for bulkheads, tanks, compartments, etc. Test heads are prescribed to insure satisfactory water or oil tightness, and also as tests of strength.
Twenty-foot equivalent unit. A standard of measurement used in container transport based on the dimensions of a container 20 ft long ´ 8 ft wide ´ 8.5 ft high; (6050 ´ 2440 ´ 2590 mm).
An order to stop hoisting.
An iron ring with a groove on the outside for a rope grommet or splice.
The pins in the unwale of a boat which are used for carlocs.
The spiral part of a screw.
Three sheets to the wind
Sailing with three sheet ropes running free, thus making the ship barely able to keep headway and control. Drunk.
Throwing a Fish
A bearing arrangement, aft of the engine(s), by which the thrust of the propeller is transmitted to the ship.
The athwartships seats in a boat on which oars-men sit.
Boards extending across a rowboat just below the gunwale to stiffen the boat and to provide seats.
At right angles to the fore and aft line (across the ship).
A single fore-and-aft or diagonal course of plating attached to deck beans under wood deck to give extra strength.
An are attached to rudder head for operating the rudder.
The edge of the flange of an angle.
A small piece of wood or bar of iron inserted in a knot to render it more secure, or to make it more readily unfastened or slipped.
A pin, usually having an eye worked on the head, and having a point so constructed, that a portion of it it may turm on a pivot pin, forming a tee shaped looking device to keep the pin in place.
The tongue of a stern post or propeller post is the raised middle section which is fastened to the vertical keel. A a rule the tongue is raised twice as high as the sides of the dished keel.
A measure of the volume of a ship. In simple terms the gross tonnage (GRT)represents the total enclosed volume of the ship and the net tonnage (NT) represents the volume of cargo and passenger spaces. Tonnage is defined by internationally agreed formulae, and is used for dues for drydocking and pilotage and port and harbour dues etc. It should be noted that tonnage represents a function of volume and should not be confused with deadweight mass (tonnes), Lightship mass (tonnes) or displacement mass (tonnes).
Openings in shelter deck bulkheads for purpose of economy in tonnage rating.
The entire internal cubic capacity of a vessel expressed in “tons” taken at 100 cubic feet each. The peculiarities of design and construction of the various tyoes of vessels and their parts necessitate certain explanatory rulings in connection with this term.
The internal cubic capacity of a vessel which remains after the capacities of certain specified spaces have been deducted from the gross tonnage.
Tonnes per centimetre immersion (TPC)
The extra buoyancy experienced due to increasing the draught by 1 cm.
Top breadth lines
The width of a vessel measured across the shelter deck.
Too heavy aloft.
A rope or chain extending from the head of a boom or gaff to a mast, or to the vessel’s structure for the purpose of supporting the weight of the boom or gaff and its loads, and permitting them to be totated at a certain level.
That portion of the side of the hull which is above the desidgned water line.
The strength of the hull in resisting twisting about a longitudinal axis.
To pull through water; vessels towed.
The path of the vessel.
The practically steady winds blowing toward the equator, N.E. in the northern and SE. in the southern hemisphere.
A strong deck beam in the after end of a vessel directly over the stern post, and connected at each end to the transom frame. The cant beams supporting the deck plating in the overhang of the stern radiate from it.
Transom frame or plate
A horizontal frame under a ship’s counter.
(1) Alignment perpendicular to the centreplane of a vessel. (2) Deck beam.
Placed at right angles to the eel, such as a transverse frame, transverse bulkhead, etc. See also Abeam Athwart.
A partition wall of planking or plating running in an athwartship direction across a portion or the whole breadht of a ship. The principal function of transverse bulkheads is to divide the ship into a series of watertight compartments so that any rupture of the shell will not cause the loss of the vessel.
Vertical planes normal to the centreline plane of the ship.
The intersections of transverse planes with the envelope of the ship’s hull.
A measure of a ship’s stability in relation to rotation about a longitudinal axis.
Fishing vessel designed for operation involving the towing of submerged nets.
The length of a vessel’s keel.
Wooden pins employed instead of nails or spikes to secure the planking of a wooden vessel to the frames.
To lash up.
A line used for suspending articles.
The period of time during which the wheelsman remains at the wheel.
The longitudinal attitude of a vessel, i.e., the difference between forward and aft drafts.
To let go.
Flat bars placed at various points on a deck girder or beams as reinforcement.
A line used for capsizing the sea anchor and hauling it in.
The flat circular piece secured on the top of the mast.
Vertical space or passage formed by bulkheads or casings extending 1 or more decks providing access or through which piping or cabling may be conducted.
The casing or partition that forms an enclosures running from deck to deck and surrounding the hatch openings.
A small and handy instrument for trying the square of surfaces while planing or fairing up with any tool. They come in various sezes and should be handled carefully to avoid knocking them out of true, and thus causing material to be spoiled by inaccurate work.
The after part of a ship where the sheel plating meets tn the run and is tucked together.
Small powerful and highly manoeuvrable vessel designed for towing, assisting and manoeuvring larger vessels in port or restricted waterways.
A small vessel fitted for towing.
Inward curvature or slope of hull sides above the waterline. (Obsolete feature.)
Turn in all standing
Go to bed without undressing.
An order to commence ship’s work.
A connecting device usually used with cable or chain and which takes up slack by rotating on its screw threads. back
A metal appliance consisting of a thread and screw capable of being set up or slacked back and used for setting up on rigging.
A connecting device usually used with cable or chain and which takes up slack by rotating on its screw threads. back
Used to pull objects together. A link threaded on both ends of a short bar, one left handed, the other right handed.
Structures designed for the mounting and handling of the guns and accessories (usually main battery guns) of a war vessel. Turrents are constructed so as to revolve about a vertical axis usually by means of electrical or hydraulic machinery.
The space between any continuous decks.
Intermediate deck within a cargo space above the lower hold and below the upper deck.
When the two blocks of a tackle have been drawn as close together as possible.
Ultra large crude carrier. Tanker of deadweight greater than 320,000 tonnes.
A small, covered opening in the top of a cargo tank through which measurements are made to determine the level of the liquid in the tank.
A small, covered opening in the top of a cargo tank through which measurements are made to determine the level of the liquid in the tank.
A metal shield in the form of a trustrum of qa cone, fitted to the outer casing of the smokestack over the air casing to keep out the weather.
A warning from aloft (heads up).
Insufficient number of crew; shorthanded.
A subsurface current in a surf.
Said of a vessel when not at anchor, nor made fast to the shore, or aground.
To remove anything from its usual place. To take apart.
Said of a lighthouse not tended.
Hoist or haul in the anchor.
A partial deck above the main deck amidships.
Superstructures, or deck erections located on or above the weather deck. Sometimes used with reference to a ship’s entire above-water structure.
A sheet metal conduit connecting the boiler furnace with thw base of the smokestack. It conveys the smoke and hot gases from the boiler to the stack, and should be made double thickness with an air space between to prevent radiation. Swinging dampers for controlling the fires are fitted in the uptake.
Uniform Shipping Laws (Australian federal code for the design, construction and stability of vessels.)
An order to cease (stop).
Vertical center of gravity; an important computation used in the determination of the stability of a vessel with its cargo. back
Vertical center of gravity; an important computation used in the determination of the stability of a vessel with its cargo. back
To slack off or move off; also said of a change of direction of wind, when the wind shifts to a different direction.
The process of providing fresh air to the various spaced, and removing foul or heated air, gases, etc., from them. This may be accomplished by natural sraft or by mechanical means.
Ventilations, bell-mouthed or cowl
Terminals on open decks in the form of a 90o elbow with enlarged or bell shaped openings, so formed as to obtain an increase of air supply when facing the wind and to increase the velocity of air down the ventilation pipe.
Installation or nacelle for the intake or exhaust of ventilation air for enclosed spaces.
The swiveled opening at the top of a ventilator.
A plate running in a fore and aft direction connecting to the flat keel and keel rider plates, it is usually connected by two angles at the top and bottom for a riveted job or welded to the keel and keel rider.
A small inclined awning running around the pilot house over the windows or air ports to exclude the glare of the sun or to prevent rain or spray from coming in the openings when the glazed frames are dropped or opened. They may be of canvas or metal.
Very large crude carrier. Tanker of deadweight between 160,000 and 320,000 tonnes.
A tube designed for the carriage of the human voice from one part of the ship to another. In its simplest form the voice tube system includes a speaking connection between the pilot house and engine room only. In large war vessels the system becomes very complicated. Voice tubes are generally made up to about four inchesin diameter and fitted with appropriate speaking and listening terminals.
Enclosed space (often watertight) intentionally left empty; (e.g., cofferdam).
The portion of the deck between the forecastle and quarterdeck of a sailing vessel.
The disturbed water left behind by a moving ship.
A room or space on shipboard set aside for use of the officers for social purpose and also used as their mess or dining room.
Cotton yarn used for cleaning purposes.
A canvas cover secured over a funnel when not in use. Sailor’s headwear, woolen type, capable of covering the ears in cold weather.
An officer taking his turn as officer of the watch.
A small cask carried in ship’s boats for drinking purposes.
Lines drawn parallel with the surface of the water at varing heights on a ship’s outline. In the sheer plan they are straight and horizontal, in the half-breadth plan they show the form of the ship at each of the successive heights marked.
The line painted on the side of the vessel at the water’s edge to indicate the proper trim.
A ship full of water but still afloat.
Filled with water but afloat.
The surface of the water.
Capable of preventing the ingress of water under a head of water likely to occur in the intact or damaged condition.
A partition of plating reinforced where necessary with stiffering bars and capable of preventing the flow of water under pressure from one compartment to another.
A space or compartment whithin a ship having its top, bottom, ans sides constructed in such a manner as to prevent the leakage of water into or from the space.
A door so constructed that, when closed, it will prevent water under pressure from passing throught.
A gutter-like recess on the shelter deck at the midship section of a ship, which delivers excess water the sea.
An angle or flat bar attached to a deck stringer plate forming the in-board boundary of a waterway and serving as an abutment for the wood deck plating.
The timber sills upon which a ship is built.
Uppermost hull deck exposed to the weather at all times.
To keep a weather eye is to be on the alert (heads up).
The windward side (from where the wind is blowing).
Capable of preventing the ingress of water in any wind and wave conditions up to those specified as critical design conditions.
The vertical portion of a beam, the athwartship portion of a frame.
Transverse side frame with deeper web, spaced at multiples of main frame stations for the provision of extra strength.
The very slow issuance of water through the seamsof a ship’s structure or from a containing vessel in insufficient quantity to produce a stream.
Lift anchor off the bottom.
To lift anchor off the sea bottom.
The method of fastening steel objects together by fusing the metal with a gas flame or an electrical arc.
A seam made by closing a joint with molten metal applied with a welding stick.
The space between the first bulkhead of a long poop deck or deck house and a fore-castle bulkhead.
A sunken deck on a marchant vessel, fitted between the forecastle and a long poop or continuous bridge house or raised quarter deck.
An order meaning sufficient (enough).
Any steel or wooden member used for temporarily bracing a bulkhead, deck section, etc.
A call requesting direction in answer to the report of a lookout that an object has been sighted.
A method of preventing the ends of a line from unlaying or fraying by turns of small stuff, stout twine or seizing wire with the ends tucked.
The white froth on the crests of waves.
At a considerable distance.
A sprocket wheel on the windlass for taking links of the chain cable.
A hoisting or pulling machine fitted with a horizontali single or double srum. A small drum is generally fitted on one or both ends of the shaft supporting the hoisting drum. These small drums are called gypsides, niggerheads, or winch heads. The hoisting drums either are fitted with a friction brake or are directly keyed to the shaft. The driving power is usually steam or electricity but hand power is also used. A winch is used principally for the purpose of handling, hoisting, and lowering cargo from a dock or lighter to the hold of a ship and vice versa.
An apparatus in which horizontallor vertical drums or gypsides and wildcats are operated by means of a steam engine or motor for the purpose of handling heavy anchor chair hawsers, etc.
To overhanging part of a deck on a ferry boat, or fore and aft of paddle boxes in a side wheeler. Also used to indicate outboard parts of the ship, such as in the wings of the hold.
The arge brackets which fasten the margin plates to the lower frame ends. (Also known as deep bracket knees and bilge brackets).
A passage way below the water line on a man-of-war, used for repairs and inspections.
Ballast or cargo tank adjacent to the hull side.
Tanks located autboard and usually just under the wether deck. They are sometimes formed by fitting a longitudinal bulkhead between the two uppermost decks, ans sometimes by working a diagonal, longitudinal flat between the ship’s side and the weather deck.
A general handyman in the engine room.
Wire mesh bulkhead
A partition built up of wire mesh panel.
Private or charter vessel designed for pleasure cruising, racing, etc. propelled by wind or power.
A term applied to a spar attached at its middle portion to a mast and running athwartship across a vessel as a support for a square sail. Signal halyards, lights, etc.
A term applied to the outer end if a yard.
To steer wildly or out of line of course.
Stress limit within a material at which plastic (permanent) strain commences under load.
Propulsion train configuration where the engine output and propeller shafts are horizontal and parallel and linked via an intermediate vertical shaft.
When the sun is in the zenith and observed with a sextant, the arc will be 90o from the horizon.
Common corrosion inhibiting primer used to coat bare steel prior to subsequent paint coatings being applied.