cleats
piece of wood or metal having two projecting arms or horns on which to belay ropes.clinometer
instrument that indicates the angle of roll or pitch of a vessel.companionway
a hatchway in a deck with a set of steps or ladders leading from one deck to another.cordage
collective term for all the ropes on a vessel.cradle
wooden frame where boats are stowed on shore.cross tree
athwartship pieces fitted over the trees on a mast.crow's nest
lookout perch attached to or near the head of a mast.cuddy
a small cabin.davit
small crane on a ship's side for hoisting boats or supplies.deadlight
a porthole lid or cover.deep waterline
the depth of a vessel in the water when carrying the maximum amount of allowable weight or cargo.derrick
a type of crane used for hoisting and swinging heavy weights.door, airtight
a door constructed to prevent the passage of air.door, watertight
a door constructed to prevent the passage of water.draft
the depth of a vessel below the waterline. Also spelled draught.draft marks
numbers on a vessel's bow or stern indicating the draft or depth of the vessel below the waterline.dry dock
a hollow floating structure designed to submerge in order to float a vessel into it, and then to lift the vessel out of the water for repairs or construction.fantail
the overhanging stern section on some vessels.fathom
nautical unit of measurement, in the United States 6 feet, or 1.829 meters.fender
protective plate, bundles of rope, old tires, or other material running along the side of a ship to prevent scratches and dents from rubbing against other vessels or piers.fetch
the distance from a wind's point of origin over the sea to a vessel, affecting the height of waves. Also, to swing around or veer.fin
a projecting keel.flotilla
fleet of small vessels.flotsam and jetsam
debris, goods, or cargo cast or washed from an imperiled or wrecked ship.flukes
the hooks or holding claws of an anchor.fore
the front of a ship or bow area.fore and aft
lengthwise of a ship.forecastle
structure on the upper deck of a ship toward the fore; the crew quarters on a merchant ship.foul
the sea growth or foreign matter covering the underwater portion of a ship's shell.founder
to sink after filling with water.galley
kitchen.gangplank
board or platform used for boarding passengers or cargo.gangway
an opening in a ship's side for the passage of freight or passengers.grapnel
similar to a small anchor, a device used for recovering small items dropped overboard or to hook onto lines from a distance.graybeards
choppy, frothy waves.gunwale
the upper edge of a side of a vessel.guys
wires, ropes, or chains used to support booms, davits, and suchlike.halyards
light lines used in hoisting signals or flags; also, the ropes used in hoisting gaffs, sails, or yards.hatchway
accessway or opening in a deck.hawse
hole through which the anchor chain is hoisted or released; any hole through which a chain or cable is passed.hawser
rope or cable used in mooring or towing. head toilet.heave to
to stop the forward motion of a vessel and lie dead in the water.heel
the leaning of a vessel to one side, caused by wind, waves, or shifting cargo.helm
the steering apparatus, including the tiller, the rudder, and the wheel.hog
scrub broom used for scraping a ship's bottom underwater.hold
space below deck for cargo.jack ladder
ladder with wooden steps and side ropes.jury
temporary structures, such as makeshift masts or rudders, used in an emergency. Also known as jury-rigging.keel
the main structural member running fore and aft along the bottom of a vessel, also known as the backbone.keelson
a beam running above the keel of a vessel.knot
unit of speed, 1 nautical mile (6,080 feet) an hour.lanyard
rope having one free end and one attached to any object for the purpose of remote control; also, any rope used for fastening riggings.lee
the side of a vessel sheltered from the wind, or leeward; opposite of the windward side.list
deviation of a vessel from an upright position, caused by waves, wind, bilging, or shifting cargo.magazine
storage compartment for the stowage of ammunition.mast
upright pole on the center line of a ship's deck, used for carrying sails or for supporting rigging, cargo, and boat-handling gear.messroom
compartment where crew members eat their meals. An officer's meal compartment is sometimes called a wardroom messroom.mooring
the operation of anchoring a vessel or securing it to a mooring buoy, wharf, or dock.mooring lines
chains, ropes, or cables used to tie a ship to a wharf or dock.nautical mile 6,080 feet.