A1 (shipping) In shipping, the designation A1 is a symbol used to denote quality of construction and material.
Able UK Able UK is a British based company specialising in the rehabilitation and development of disused sites and facilities, demolition, site reclamation, re-mediation, regeneration and waste disposal.
ABS Steels ABS Steels are types of structural steel which are standardized by the American Bureau of Shipping for use in shipbuilding.
Anti-fouling paint Anti-fouling paint or bottom paint is a specialized coating applied to the hull of a ship or boat in order to slow the growth of organisms that attach to the hull and can affect a vessel's...
Antiroll Tanks Antiroll Tanks are tanks fitted on to ships in order to improve their response to roll motion.
Axe bow The axe bow is a wave-piercing type of a ship's bow, characterised by a vertical prow and a relatively long front hull.
Balanced rudder A balanced rudder is a rudder in which the axis of rotation of the rudder is behind its front edge.
Ballast pond A ballast pond was a construction found in shipyards during the age of sail.
Ballast tank A ballast tank is a compartment within a boat, ship or other floating structure that holds water.
Barbette A barbette is a protective circular armour feature around a cannon or heavy artillery gun.
Beitass A beitass, or stretching pole, is a wooden spar used on Viking ships that was fitted into a pocket at the lower corner of the sail.
Bennett & Associates LLC Bennett & Associates L.L.Cis an independent Naval Architecture, Offshore Design and Consulting firm that was founded in 1997 by William T. Bennett, Jr. Bennett & Associates is currently headqua...
Bilge The bilge (IPA: /bɪldʒ/) is the lowest compartment on a ship, below the waterline, where the two sides meet at the keel.
Bilge keel A bilge keel is used to reduce a ship's tendency to roll.
Bimini top A Bimini top is an open-front canvas top for the cockpit of a boat, usually supported by a metal frame.
Boat building Boat building, one of the oldest branches of engineering, is concerned with constructing the hulls of boats and, for sailboats, the masts, spars and rigging.
Boom vang A boom vang (US) or kicking strap (UK) is a line or piston system on a sailboat used to exert downward force on the boom and thus control the shape of the sail.
Bow (ship) The bow is a nautical term for the forward part of the hull of a ship or boat, the point that is most forward when the vessel is underway.
Bow visor A bow visor is a feature of some ships, in particular ferries and Roll-on/roll-off ships, that allows the bow to articulate up and down, providing access to the cargo ramp and storage deck near ...
Braces (sailing) The braces on a square-rigged ship are lines used to rotate the yards around the mast, to allow the ship to sail at different angles to the wind.
Bridge (nautical) The bridge of a ship is the room or platform from which the ship can be commanded.
Bridge wing A bridge wing is a narrow walkway extending outward from both sides of a pilothouse to the full width of a ship.
Bug shoe The bug shoe is a length of ironbark on the bottom of a ship that goes on the bottom of the skeg to protect it from shipworms.
Bulbous bow A bulbous bow is a protruding bulb at the bow of a ship just below the waterline.
Bulkhead (barrier) A bulkhead is a retaining wall, such as a bulkhead within a ship or a watershed retaining wall.
Bulkhead (partition) A bulkhead is an upright wall within the hull of a ship or within the fuselage of an aeroplane.
Buoyancy In science, buoyancy is an upward force exerted by a fluid that opposes the weight of an immersed object.
Carling (sailing) In shipbuilding, carlings are two pieces of timber laid fore and aft under the deck of a ship, from one beam to another, directly over the keel.
Carvel (boat building) Carvel built or carvel planking is a method of boat building where hull planks are fastened edge to edge, gaining support from the frame and forming a smooth surface.
Cathedral hull A cathedral hull is a hull shape used in modern boats, usually power-driven.
Cavitation Cavitation is the formation and then immediate implosion of cavities in a liquidi.e.
Chalmers Naval Architecture Students' Society The Chalmers Naval Architecture Students' Society (also known as the Föreningen Chalmers Skeppsbyggare or FCS) is a naval architecture graduate students group at Chalmers University of Technolog...
Circular arc hull The circular arc hull was created by the Swedish engineer Fredrik Ljungström.
Clear view screen On ships, a clear view screen or clearview screen is a glass disk mounted in a window, usually on the bridge, that rotates at high speed to disperse rain, spray, and snow.
Clinker (boat building) Clinker built (also known as lapstrake) is a method of boat building where the edges of hull planks overlap, called a "land" or "landing."
Coaming Coaming is any vertical surface on a ship designed to deflect or prevent entry of water.
Cochin Shipyard Cochin Shipyard Limited is the largest ship building and maintenance facility in India.
Coin ceremony The Coin Ceremony is an event which takes place at the keel laying, in the early stages of a ship's construction.
Compartment (ship) A compartment is a portion of the space within a ship defined vertically between decks and horizontally between bulkheads.
Compensated gross tonnage Compensated Gross Tonnage (CGT) is an indicator of the amount of work that is necessary to build a given ship and is calculated by multiplying the tonnage of a ship by a coefficient, which is de...
Composite ship The technique of composite ship construction (wooden planking over a wrought iron frame) emerged in the mid-19th century as the final stage in the evolution of fast commercial sailing ships.
Conning tower A conning tower is a raised platform on a ship or submarine, often armored, from which an officer can conn the vessel, i.e.
Constanzi stern A Constanzi stern is a type of stern designed for use on ocean-going vessels.
Consuta Consuta was a revolutionary form of construction of watertight hulls for boats and marine aircraft, comprising four veneers of mahogany planking interleaved with waterproofed calico and stitched...
Controllable pitch propeller A controllable pitch propeller or variable pitch propeller is a type of propeller with blades that can be rotated around their long axis to change their pitch.
Copper sheathing Copper sheathing is the practice of protecting the under-water hull of a ship or boat from the corrosive effects of salt water and biofouling through the use of copper plates affixed to the outs...
Corrosion in ballast tanks Corrosion in Ballast Tanks is the deterioration process where the surface of a ballast tank progresses from microblistering, to electroendosmotic blistering, and finally to cracking of the tank ...
Crow's nest A crow's nest is a structure in the upper part of the main mast of a ship or a structure that is used as a lookout point.
David Taylor Model Basin The David Taylor Model Basin is one of the largest ship model basins — test facilities for the development of ship design — in the world.
Davit A davit is a structure, usually made of steel, which is used to lower things over an edge of a long drop-off, such as scaffolding down a building exterior or launching a lifeboat over the side o...
DC distribution system The DC distribution system has been proposed, as a replacement for the present AC power distribution system for ships with electric propulsion.
Deadweight tonnage Deadweight tonnage (also known as deadweight abbreviated to DWT, D.W.T., d.w.t.
Deck (ship) A deck is a permanent covering over a compartment or a hull of a ship.
Deck prism A deck prism is a prism inserted into the deck of a ship which provides light down below.
Displacement (ship) A ship's displacement or displacement tonnage is the weight of the water that a ship displaces when it is floating; the term is defined ordinarily such that the ship's fuel tanks are full ...
Dorade box A dorade box is a type of vent that permits the passage of air in and out of the cabin or engine room of a boat while keeping rain, spray, and sea wash out.
Double bottom A double bottom is a ship hull design and construction method where the bottom of the ship has two complete layers of watertight hull surface: one outer layer forming the normal hull of the ship...
Double hull A double hull is a ship hull design and construction method where the bottom and sides of the ship have two complete layers of watertight hull surface: one outer layer forming the normal hull of...
Emerson Cavitation Tunnel The Emerson Cavitation Tunnel is a propeller testing facility based at Newcastle University, UK. The tunnel is based in the department of Marine Science and Technology, and is currently the seco...
Engine order telegraph An engine order telegraph or E.O.T., often also chadburn, is a communications device used on a ship for the pilot on the bridge to order engineers in the engine room to power the ves...
Engine room On a ship, the engine room, or ER, is the propulsion machinery spaces of the vessel.
F Collar Collars Oars is a UK, Oxford based business specialising in producing hand crafted wooden yacht masts, wooden oars and spars.
False keel The false keel was a timber, forming part of the hull of a wooden sailing ship.
Finnish-Swedish ice class The Finnish-Swedish ice class is an ice class assigned to a vessel operating in first-year ice in the Baltic Sea and calling Finnish or Swedish ports.
Fire room On a ship, the fire room, or FR or boiler room or stokehold, referred to the space of a vessel where water was brought to a boil.
Fitting-out Fitting-out, or "outfitting”, is the process in modern shipbuilding that follows the float-out of a vessel and precedes sea trials.
Flat spline A spline or the more modern term flexible curve consists of a long strip fixed in position at a number of points that relaxes to form and hold a smooth curve passing through those points f...
Float-out Float-out is the process in modern shipbuilding that follows the keel laying and precedes the fitting-out process.
Flush deck In naval architecture, a flush deck refers to when the upper deck of a vessel extends unbroken from stem to stern.
Fondo Egone Missio Archives The Fondo Egone Missio contains thousands of documents and photographs 1909-1967 relevant to the design and construction of passenger ships, from the original drawings of Monfalcone yard no.
Forecastle Forecastle refers to the upper deck of a sailing ship forward of the foremast, or the forward part of a ship with the sailors' living quarters.
Froude–Krylov force In fluid dynamics, the Froude–Krylov force — sometimes also called the Froude–Kriloff force — is a hydrodynamical force named after William Froude and Alexei Krylov.
Funnel (ship) A funnel is the smokestack or chimney on a ship used to expel boiler steam and smoke or engine exhaust.
Furring In light-frame construction, furring strips are long thin strips of wood or metal used to make backing surfaces to support the finished surfaces in a room.
Future boat developments Two aims of future boat development are fuel efficiency through reduction of drag and protection of the environment against pollution through use of 'cleaner' fuel sources.
Gaff vang A gaff vang is a line on a gaff rig sailboat used to exert lateral force on the gaff and thus control the shape of the sail.
Gangway (nautical) The Gangway is a narrow passage that joins the quarterdeck to the forecastle of a sailing ship.
George Steers and Co George Steers & Co was a shipyard company at Greenpoint, Long Island, New-York.
Gripe (tool) A gripe is a simple form of clamp used in building a clinker boat, for temporarily holding the strake which is being fitted onto the one to which it is to be attached.
Gross tonnage Gross tonnage (often abbreviated as GT, G.T. or gt) is a unitless index related to a ship's overall internal volume.
Gun port A gun port is an opening in the side of the hull of a ship, above the waterline, which allows the muzzle of artillery pieces mounted on the gun deck to fire outside.
Gunwale The gunwale is a nautical term describing the top edge of the side of a boat.
Guy-wire A guy-wire or guy-rope, also known as simply a guy, is a tensioned cable designed to add stability to a free-standing structure.
Gwennan Gorn Madoc or Madog ab Owain Gwynedd was, according to folklore, a Welsh prince who sailed to America in 1170, over three hundred years before Christopher Columbus's voyage in 1492.
Half hull model ship A half hull model ship (also known as a "half hull" or "half ship") is a wooden model ship featuring only one half of a boat's hull without rigging or other fixtures.
Hammock A hammock is a sling made of fabric, rope, or netting, suspended between two points, used for swinging, sleeping, or resting.
Hawsehole Hawsehole is a nautical term for a small hole in the hull of a ship through which hawsers may be passed.
Hawser Hawser is a nautical term for a thick cable or rope used in mooring or towing a ship.
Henry Gildersleeve Henry Gildersleeve, a 19th Century American shipbuilder involved in the construction of 120 vessels of all types, was born in Gildersleeve, Connecticut (now part of Portland, Connecticut), on Ap...
Hindustan Shipyard Limited Hindustan Shipyard Limited (HSL) formerly Scindia Shipyard is a Government of India owned Public Sector Undertaking located in Visakhapatnam, Andhra Pradesh on the East coast of India.
Ice class Ships with an Ice Class have a strengthened hull to enable them to navigate through sea ice.
Ice tank An ice tank is a ship model basin whose purpose is to provide a physical modeling environment for the interaction of ship, structures, or sea floor with both ice and water.
In-water Survey In-water Survey is a method of surveying the underwater parts of a ship while it is still afloat instead of having to dry-dock it for examination of these areas as was conventionally done.
Integrated Platform Management System An integrated platform management system (IPMS) is a distributed architecture system used on board ships and submarines for the real-time monitoring and control of the vessel's hull, mechanical,...
Integrated topside design Integrated topside design is a design approach used by military ship and ship equipment designers to overcome the challenges of effectively operating shipboard antenna systems and equipment susc...
Inverted bow In ship design, an inverted bow is a ship's or large boat's bow whose farthest forward point is not at the top.
J.L. Thompson and Sons J.L. Thompson and Sons was a shipyard on the River Wear, Sunderland, which produced ships from the mid-18th century until the 1980s.
Jackline A jackline is a rope or wire strung from a ship's bow to stern to which a safety harness can be clipped, allowing a crewmember to move about the deck safely when there is risk of falling or bein...
Jib A jib is a triangular staysail that sets ahead of the foremast of a sailing vessel.
Jumboisation Jumboisation is a technique in shipbuilding consisting of enlarging a ship by adding an entire section to it.
Junk (ship) A junk is an ancient Chinese sailing vessel/ship design still in use today.
Karachi Shipyard The Karachi Shipyard & Engineering Works Limited (KSEW), is Situated at West Wharf in Karachi, Sindh, Pakistan.
Keel In boats and ships, keel can refer to either of two parts: a structural element, or a hydrodynamic element.
Keel laying In boats and ships, keel can refer to either of two parts: a structural element, or a hydrodynamic element.
Kelson The kelson or keelson is the member which, particularly in a wooden vessel, lies parallel with its keel but above the transverse members such as timbers, frames or in a larger vessel, floors.
Kingston valve A Kingston valve is a type of valve fitted in the bottom of a ship's fuel, water and ballast tanks.
Lattice mast Lattice masts, or cage masts, are a type of observation mast common on major warships in the early 20th century.
Lazarette A lazarette is a special area on a boat.
Limber hole A limber hole is a drain hole through a frame in a boat designed to prevent water from accumulating against one side of the frame.
Lindholmsdockan Lindholmsdockan is Sweden's oldest dry dock and is located in Gothenburg, Sweden.
Lofting Lofting is a drafting technique (sometimes using mathematical tables) whereby curved lines are generated, to be used in plans for streamlined objects such as aircraft and boats.
Longitudinal framing Longitudinal framing is a method of ship construction in which large, widely spaced transverse frames are used in conjunction with light, closely spaced longitudinal members.
Lyon's Whelp Lyon's Whelp was the name given to several British naval ships dating back to the 16th century, including at least two that were not financed or built by the Duke of Buckingham.
Mack (ship) In naval architecture, a Mack is a structure which combines the radar MAsts and the exhaust stACK of a surface ship, thereby saving the upper deck space used for separate funnels and the increas...
Magrodome A magrodome is a sliding glass roof found aboard passenger ships.
Main battery Generally used only in the terms of naval warfare, the main battery is the primary weapon around which a ship was designed.
MEKO The MEKO family of warships was developed by the German company Blohm + Voss.
Mid-Deck Tanker A Mid-Deck Oil Tanker is a tanker design, which includes an additional deck intended to limit spills if the tanker is damaged.
Milgem class corvette The MİLGEM project, from the Turkish words Milli Gemi, is a Turkish national warship program, the purpose of which is to build a modern littoral combat warship with indigenous anti-submarine...
Moon pool A moon pool is a feature of marine drilling platforms, drillships and diving support vessels, some marine research and underwater exploration or research vessels, and underwater habitats, in whi...
Nantucket shipbuilding Nantucket Shipbuilding – China Trade / Whaling Nantucket, Massachusetts island lies 30 miles off the southern coastline of Cape Cod, Massachusetts.
Nautical Wheelers Nautical Wheelers refers to a ship builder that specifically works on the fabrication of hulls of ships.
Naval architecture Naval architecture is an engineering discipline dealing with the design, construction, maintenance and operation of marine vessels and structures.
Naval stores Naval stores are all products derived from pine sap, which are used to manufacture soap, paint, varnish, shoe polish, lubricants, linoleum, and roofing materials.
Naval stores industry The naval stores industry collects, processes, and markets forest products created from the oleoresin of particular types of pine tree (genus Pinus), the slash pine and the longleaf pine.
Net tonnage Net tonnage (often abbreviated as NT, N.T. or nt) is a dimensionless index calculated from the total moulded volume of the ship's cargo spaces by using a mathematical formula.
Nguzu nguzu The nguzu nguzu (sometimes called a musu musu or toto isu) is the traditional figurehead which was formerly affixed to canoes in the Solomon Islands.
Oily water separator An oily water separator (OWS) is a piece of shipboard equipment that allows a vessel's crew to separate oil from bilge water before the bilge water is discharged overboard.
Onboard DC grid Onboard DC Grid allows for new ways of thinking regarding operational optimization.
Orlop The orlop is the lowest deck in a ship (except for very old ships).
Outrigger An outrigger is a part of a boat's rigging which is rigid and extends beyond the side or gunwale of a boat.
Padded V-hull A padded v-hull is a type of high performance watercraft.
Pagoda mast The pagoda mast was a type of superstructure that was common on Japanese capital ships that were reconstructed during the 1930s in a bid to improve their fighting performance.
Patent slip The Patent slip or Marine Railway was invented by Scot Thomas Morton in 1818 as a cheaper alternative to a dry dock for ship repair.
Pettit Marine Paint Pettit Marine Paint is a manufacturer of marine coatings and epoxies for consumer and commercial markets.
Pilothouse A pilothouse or pilot-house is a glass-enclosed room from which a ship is controlled by the ship's pilot.
Plank (wood) A plank is a piece of timber that is flat, elongated, and rectangular with parallel faces that are higher and longer than wide.
Pontoon effect The pontoon effect refers to the tendency of a vessel whose flotation depends on lateral pontoons to capsize without warning when a lateral force is applied.
Poop deck In naval architecture, a poop deck is a deck that forms the roof of a cabin built in the rear, or "aft", part of the superstructure of a ship.
Porthole A porthole is a generally circular window used on the hull of ships to admit light and air.
Promenade deck The promenade deck is a deck found on several types of passenger ships and riverboats.
Propeller A propeller is a type of fan that transmits power by converting rotational motion into thrust.
Propeller (marine) A propeller is a type of fan that transmits power by converting rotational motion into thrust.
Prow The prow is the forward most part of a ship's bow that cuts through the water.
Quarterdeck The quarterdeck is a raised deck behind the main mast of a sailing ship.
Rake (angle) A rake is an angle of slope measured from horizontal, or from a vertical line 90° perpendicular to horizontal.
Ram bow A ram bow or rostrum (Latin for 'beak' or 'prow') is form of bow on naval ships which allows one ship to attack another by crashing into it at high speed.
Rankine body The Rankine body discovered by William John Macquorn Rankine, is a feature of naval architecture involving the flow of liquid around a body/surface.
Refitting of boats Refitting or refit of boats includes repairing, fixing, restoring, renewing, mending, and renovating and old vessel.
Response amplitude operator In the field of ship design and design of other floating structures, a response amplitude operator (RAO) is an engineering statistic, or set of such statistics, that are used to determine ...
Rudder A rudder is a device used to steer a ship, boat, submarine, hovercraft, aircraft or other conveyance that moves through a medium.
Sail-plan A sail-plan is a set of drawings, usually prepared by a naval architect.
Sampson post This is a glossary of nautical terms; some remain current, many date from the 17th-19th century.
Schilling Rudder A Schilling Rudder is a specific type of profiled rudder used on certain boats and ships.
Schilling rudder A Schilling rudder is a specific type of profiled rudder used on certain boats and ships.
Sea chest A sea chest is a rectangular recess in the hull of a ship.
Sea trial A sea trial is the testing phase of a watercraft (including boats, ships, and submarines).
Seacock A seacock is a valve on the hull of a boat, permitting water to flow into the boat, such as for cooling an engine or for a salt water faucet; or out of the boat, such as for a sink drain or a toilet.
Ship collision Ship collision is the structural impact between two ships or one ship and a floating or still object such as an iceberg.
Ship cradle A Ship cradle is a support, made of wood or metal, to hold a ship or boat upright on land so that the vessel can be built or repaired.
Ship floodability Floodability is a characteristic of the construction of a ship to resist flooding.
Ship grounding Ship grounding is a type of marine accident that involves the impact of a ship on the seabed, and may cause damage to the submerged part of her hull and particularly the bottom structure, potent...
Ship model basin A ship model basin is a physical basin or tank used to carry out hydrodynamic tests with ship models, for the purpose of designing a new ship, or refining the design of a ship to improve t...
Ship stability Ship stability is an area of naval architecture and ship design that deals with how a ship behaves at sea, both in still water and in waves.
Shipbuilding Shipbuilding is the construction of ships and floating vessels.
Shipbuilding contract Shipbuilding contract, which is the contract for the complete construction of a ship, concerns the sales of future goods, so the property could not pass title at the time when the contract is co...
Shipbuilding countries Shipbuilding Countries Ranking As per International Trade Centre (ITC) calculation through COMTRADE statistics, world exports of all types of floating structures were worth US$106.79 billion in 2007.
Shipfitter A shipfitter is a marine occupational classification used both by naval activities and among ship builders; however, the term applies mostly to certain workers at commercial and naval shipyards ...
Shiplift A shiplift is a modern alternative for a slipway, a floating dry dock or a graving dry dock.
Shipyard Shipyards and dockyards are places where ships are repaired and built.
Shipyard transporter A Shipyard transporter is a heavy equipment transporter or heavy trailer and is often used in shipyards but is not limited to them.
Significant wave height In physical oceanography, the significant wave height (SWH or Hs) is defined traditionally as the mean wave height (trough to crest) of the highest third of the waves (H1/3).
Slamming Slamming is the impact of the bottom structure of a ship onto the sea surface.
Slipway A slipway, also known as boat ramp or launch, is a ramp on the shore by which ships or boats can be moved to and from the water.
Steering oar The steering oar or steering board is an oversized oar or board to control the direction of a ship or other watercraft prior to the invention of the rudder.
Steering pole A steering pole is a light spar extending from the bow of a straight deck ship which aids the wheelsman in steering.
Stem (ship) The stem is the very most forward part of a boat or ship's bow and is an extension of the keel itself.
Stern The stern is the rear or aft-most part of a ship or boat, technically defined as the area built up over the sternpost, extending upwards from the counter rail to the taffrail.
Sternpost A sternpost is the upright structural member or post at the stern of a ship or a boat, to which are attached the transoms and the rearmost left corner part of the stern.
Stocks (shipyard) Stocks are an external framework in a shipyard used to support construction of (usually) wooden ships.
Stowage In naval architecture, stowage is the amount of room available for stowing materials aboard a ship, tank or an airplane.
Strake A strake is part of the shell of the hull of a boat or ship which, in conjunction with the other strakes, keeps the sea out and the vessel afloat.
Strength of ships The strength of ships is a topic of key interest to naval architects and shipbuilders.
Strip-built Strip-built is a method of boat building commonly used for canoes and kayaks, but also suitable for larger boats.
Stuffing box A stuffing box is an assembly which is used to house a gland seal.
Sun deck Sun deck is a deck with the purpose to offer sun tanning, fresh air and occasional drink and food opportunities.
Superstructure A superstructure is an upward extension of an existing structure above a baseline.
TCG Heybeliada (F-511) TCG Heybeliada (F-511) is the lead ship of the Ada class ASW corvettes of the Turkish Navy.
Texas (nautical) A Texas is a deck directly below the pilothouse of a straight-deck paddle steamer/ riverboat.
Thwart A thwart is a strut placed crosswise in a ship or boat, to brace it crosswise.
Trailboard The trailboards are a pair of boards that may be found at the bow of certain sailing vessels, where they run from the figurehead or billethead back to or towards the hawsepipe.
Treenail A treenail, also trenail or trunnel, is a wooden peg or dowel used to fasten pieces of wood together, especially in timber frame construction and wooden shipbuilding.
Tribon Tribon is a naval architecture program originally developed by Kockum Computer Systems (KCS) for designing commercial and naval vessels.
Trim tab Trim tabs are small surfaces connected to the trailing edge of a larger control surface on a boat or aircraft, used to control the trim of the controls, i.e. to counteract hydro- or aerodynamic ...
Tumblehome In ship designing, the tumblehome is the narrowing of a ship's hull with greater distance above the water-line.
Tunnel hull A tunnel hull is a type of boat hull that uses two typically planing hulls with a solid center that traps air.
Turret deck ship A turret deck ship is a type of merchant ship with an unusual hull, designed and built in the late 19th and early 20th centuries.
Turret ship Turret ships were a 19th-century type of warship, the earliest to have their guns mounted in a revolving gun turret, instead of a broadside arrangement.
Unstayed mast An unstayed mast is a type of mast on a boat that is not supported by any stays.
V-hull (boat) A V-hull, is the shape of a boat or ship in which the contours of the hull come in a straight line to the keel.
Venetian Arsenal The Venetian Arsenal (Arsenale di Venezia) was a complex of state-owned shipyards and armories clustered together in Venice in northern Italy.
Vent (submarine) In submarine technology a vent is a valve fitted to the top of a submarine's ballast tanks to let air escape from the top of the ballast tank and be replaced by water entering through the openi...
Wale A wale is a thick plank of wood fastened to the side of a ship to provide protection from wear.
Water channel Main article: Ship model basin A water channel is an experimental tank for studying resistance and propulsion behaviour of ships, submarines, or other sea vessels.
Water tunnel (hydrodynamic) A water tunnel is an experimental facility used for testing the hydrodynamic behavior of submerged bodies in flowing water.
Waterline length The waterline length (originally Load Waterline Length, abbreviated to LWL) is a measurement of ships and boats.
Wave-piercing A wave-piercing boat hull has a very fine bow, with reduced buoyancy in the forward portions.
Well deck In traditional nautical use well decks were decks lower than decks fore and aft, usually at the main deck level, so that breaks appear in the main deck profile as opposed to a flush deck profile.
Well dock A well deck or well dock is a hangar-like deck located at the waterline in the stern of some amphibious warfare ships.
Windlass The windlass is an apparatus for moving heavy weights.
Windlass room A windlass room is a triangular space enclosed within the bow of a freshwater ship where the anchor windlasses are located.
Winged keel The Winged Keel is a sailboat keel originally designed by Ben Lexcen and made its first appearance on the 12-metre class yacht Australia II in the 1983 America's Cup.