- Aback
- Aback
- Abaft
- Abaft the beam
- Abandon Ship
- Abeam
- Abel Brown
- Aboard
- About
- Above board
- Above-water hull
- Abreast
- Absentee pennant
- Accommodation
- Accommodation ladder
- Act of Pardon / Act of Grace
- Admiral
- Admiralty
- Admiralty law
- Adrift
- Advance note
- Afloat
- Aft
- Afternoon watch
- Aground
- Ahead
- Ahoy
- A-hull
- Ahull
- Aid to Navigation
- A-lee
- All hands
- All night in
- Aloft
- Alongside
- Amidships
- Amidships (or midships)
- Ammeter
- Anchor
- Anchorage
- Anchor ball
- Anchor buoy
- Anchor chain or cable
- Anchor detail
- Anchor light
- Anchor rode
- Anchor’s aweigh
- Anchor watch
- Andrew
- Anemometer
- Anode
- Anti-fouling
- Apparent wind
- Apron
- Arc of Visibility
- Armament
- Armature
- Articles of War
- Ashore
- Aspect ratio
- Astern
- As the crow flies
- ASW
- Asylum Harbour
- Athwart
- Athwart, athwartships
- Athwart-ships
- Auxiliary engine
- Avast
- Awash
- Aweigh
- Aye, aye
- Azimuth circle
- Azimuth compass
- Back
- Back and fill
- Backstays
- Backwinding
- Baffle plate
- Baggywrinkle
- Balanced rudder
- Ballast
- Bank (sea floor)
- Banyan
- Bar
- Barber hauler
- Bare-poles
- Barnacle
- Barometer
- Bar pilot
- Barrelman
- Batten
- Beacon
- Beam
- Beam ends
- Bear
- Bear down
- Bearing
- Beating
- Beaufort Scale
- Becalm
- Becket
- Bedding compound
- Before the mast
- Before the wind
- Belay
- Belaying pins
- Below
- Bend
- Bermudan or Bermudian rig
- Bermudan rig
- Berth
- Best bower (anchor)
- Between decks
- Between the Devil and the deep blue sea
- Bight
- Bilge
- Bilge blower
- Bilged on her anchor
- Bilge keel
- Bill
- Bimini
- Bimmy
- Binnacle
- Binnacle list
- Bitter end
- Bitter, or bitter-end
- Bitt, plural Bitts
- Bitts
- Blade
- Blanket
- Block
- Bloody
- Blue Peter
- Bluff
- Board
- Boat
- Boat hook
- Boatswain or bosun
- Bobstay
- Bobstays
- Bollard
- Bolt-rope
- Bombay runner
- Bonded Jacky
- Bonding conductor
- Booby
- Booby hatch
- Boom
- Boom crutch
- Booms
- Boom vang (vang)
- Boot top
- Bosun's chair
- Bottomry
- Bound
- Bow
- Bow and buttock lines
- Bow-chaser, chase or chase-piece
- Bow line
- Bowline
- Bowse
- Bowsprit
- Bow wave
- Box
- Box the Compass
- Boy seaman
- Brace
- Brail
- Brake
- Brake horsepower (bhp)
- Brass monkeys or brass monkey weather
- Breaker points
- Break out
- Breast-hooks
- Bridge
- Bridle
- Bring to
- Broach
- Broaching-to
- Broad reach
- Brushes
- Buffer
- Bulkhead
- Bull of Barney
- Bulwark
- Bulwarks
- Bumboat
- Bumpkin
- Bumpkin/Boomkin
- Bunk
- Bunt
- Bunting Tosser
- Buntline
- Buoy
- Buoyed Up
- Burdened vessel
- Burgee
- Butt
- Buttock
- By
- By and Large
- By-pass
- By the board
- By the lee
- Cabin
- Cabin boy
- Cable
- Camber (or draught)
- Cam shaft
- Canister
- Cape Horn fever
- Cap shroud
- Capsize
- Capstan
- Captain’s daughter
- Cardinal
- Cardinal points
- Careen
- Careening
- Carlings
- Carry-away
- Carvel
- Cast
- Cat
- Catalyst
- Catamaran
- Cat boat
- Catboat
- Cat Head
- Cathode
- Cat o’ nine tails
- Cat’s paw
- Caulk
- Cavitation
- Ceiling
- Cell
- Centreboard
- Centre of effort
- Centre of gravity
- Centre of lateral resistance
- Chafe
- Chafing
- Chafing Gear
- Chain plates
- Chain shot
- Chain-wale or channel
- Chamfer
- Chart
- Chase guns
- Check
- Cheeks
- Chine
- Chine log
- Chock-a-block
- Chocks
- Civil Red Ensign
- Clamps
- Clawing off
- Clean bill of health
- Clean slate
- Cleat
- Clench
- Clew
- Clew-lines
- Clew-outhaul
- Clinker
- Close-hauled
- Close-reefed
- Clove-hitch
- Club hauling
- Coach roof
- Coaming
- Coat
- Cockpit
- Code signals
- Coil
- Cold plug
- Common ground point
- Commutator
- Companion
- Companionway
- Compass
- Condenser
- Conning
- Cooling water
- Corrector
- Corrosion
- Counter
- Couple
- Course
- Covering boards
- Coxswain or cockswain
- Crab
- Cradle
- Craft
- Crance/Crans/Cranze iron
- Crazing
- Cringle
- Cro’jack or crossjack
- Crosstree
- Crow’s nest
- Crutch
- Cuddy
- Cunningham
- Cunningham eye
- Cuntline
- Cunt splice
- Curtain
- Cut and run
- Cut of his jib
- Cutter
- Cut-water
- Dagger board
- Daggerboard
- Davits
- Davy Jones’ Locker
- Daybeacon
- Dayboard
- Day-sailer
- Deadeye
- Dead reckoning
- Deadrise
- Deadwood
- Dead-wood
- Deck
- Deckhead
- Decks
- Deck supervisor
- Deep six
- Departure
- Derrick
- Deviation
- Devil seam
- Devil to pay (or Devil to pay, and no pitch hot)
- Diagonals
- Diamond
- Diesel engine
- Dinghy
- Directional light
- Displacement
- Displacement hull
- Disrate
- Distributor
- Docking light
- Dock or slip
- Doghouse
- Dog watch
- Dog-watches
- Dolphin
- Dorade ventilator
- Double block
- Double ender
- Double the angle on the bow
- Douse
- Downhaul
- Downwind
- Draft
- Draught
- Draw
- Dressing down
- Drifter
- Drip collector
- Drive
- Driver
- Driver-mast
- Dry exhaust
- Dry rot
- Duck
- Dunnage
- Earing
- Earrings
- Ebb
- Eddy
- Electrolysis
- Embayed
- End plate effect
- Engine room
- Ensign
- Entrance
- Epoxy resin
- Equinox
- Even-keel
- Exhaust manifold
- Extremis
- Eye of a vessel
- Eye splice
- Fag
- Fairlead
- Fake
- Fall
- False keel
- Fathom
- Feather
- Fender
- Fend off
- Fetch
- Fid
- Fiddle-block
- Fife-rail
- Figurehead
- Filler
- Filter
- Fireship
- First Lieutenant
- First Mate
- First rate
- Fish
- Fitting out
- Fix
- Flag hoist
- Flame arrestor
- Flare
- Flash point
- Flatback
- Flood
- Floor
- Floors
- Floor timbers
- Flotsam
- Fluke
- Flukes
- Flush
- Flush deck
- Flushing plug
- Fly by night
- Flying bridge
- Following sea
- Foot
- Footing
- Footloose
- Footrope
- Fore
- Fore-and-aft
- Fore-and-aft rig
- Forecastle
- Forefoot
- Foremast jack
- Forestays
- Forward
- Foul
- Founder
- Frame
- Frap
- Free
- Freeboard
- Freshen
- Full and by
- Furl
- Futtocks
- Gaff
- Gaff rigged
- Galley
- Gammon iron
- Gangplank
- Gangway
- Garbled
- Garboard
- Garboard planks
- Garboard-strake
- Gaskets
- Gear
- Gear case
- Gel coat
- Gel time
- Genoa
- Ghost
- Ghosting
- Gimbals
- Glass fibre
- Global Positioning System
- Go about
- Gooseneck
- Grab rails
- Granny knot
- Grapeshot
- Grapnel
- Grating
- Grave
- Gripe
- Grog
- Groggy
- Grommet
- Ground
- Ground tackle
- Gudgeons
- Gunner’s daughter
- Gunter rig
- Gunwale
- Guy
- Gybe
- Hail
- Halyard or Halliard
- Halyards
- Hammock
- Hand
- Hand Bomber
- Hand over fist
- Handsomely
- Handy billy
- Hank
- Hanks
- Harbor
- Hard chine
- Harden
- Hard over
- Hatch
- Hatchway, hatch
- Hauling part
- Haul wind
- Hawse-hole
- Hawse pipe
- Hawsepiper
- Head
- Head board
- Head of navigation
- Headsail
- Head sails
- Head-to-wind
- Heat exchanger
- Heave
- Heave down
- Heave short
- Heave to
- Heaving to
- Heavy weather
- Heel
- Helm
- Helmsman
- Highfield lever
- Hitch
- Hog
- Hogged
- Hogging
- Hold
- Holiday
- Holystone
- Home
- Horn
- Horn timber
- Horse
- Horse (or hawse)
- Hot plug
- Hounds
- Hull
- Hull speed
- Hydrofoil
- Hydroplane
- Icing
- Idlers
- Inboard
- Inboard-outboard
- Inboard-Outboard drive system
- Inclinometer
- Inglefield clip
- In irons
- In stays
- In stops
- Intake manifold
- In the offing
- In-water Survey
- Jack
- Jacklines or Jack Stays
- Jack Tar
- Jaws
- Jet
- Jetsam
- Jib
- Jibboom
- Jibe
- Jigger-mast
- Joggle
- Jollies
- Jumper struts
- Junk
- Jury-mast
- Kedge
- Keel
- Keelhauling
- Keelson
- Kelson
- Ketch
- Kicker
- Kicking strap
- Killick
- King plank
- Kink
- Knee
- Knees
- Knock
- Knot
- Know the ropes
- Lacing
- Ladder
- Laker
- Laminate
- Land-fall
- Land lubber
- Lanyard
- Larboard
- Large
- Lateral System
- Latitude
- Lay
- Lay down
- Lazarette
- Leading edge
- League
- Ledges
- Lee
- Leech
- Lee helm
- Lee shore
- Lee side
- Leeward
- Leeway
- Let go and haul
- Letter of marque and reprisal
- Lifelines
- Lift
- Limbers, or limber holes
- Line
- Liner
- Line squall
- Linkage
- List
- L.O.A.
- Loaded to the gunwales
- Locker
- Log
- Log-book
- Loggerhead
- Longitude
- Loom
- Loose cannon
- Loose-footed
- Loose footed
- Lower unit
- Lubber line
- Lubber’s line
- Luff
- Luffing
- Luff up
- L.W.L.
- Lying ahull
- Magneto
- Main
- Mainbrace
- Mainmast (or Main)
- Main saloon
- Mainsheet
- Main sheet
- Mainsheet horse
- Mallet
- Man of war
- Man overboard!
- Marconi rig
- Marina
- Marine borers
- Marines Soldiers afloat
- Marl
- Marline
- Marlin spike
- Marry
- Mast
- Mast butt
- Master
- Master-at-Arms
- Mast head
- Masthead
- Masthead rig
- Mast partners
- Matelot
- Mess
- Mess deck catering
- Messenger
- Midshipman
- Midships
- Mile
- Miss-stays
- Mizzen
- Mizzenmast (or Mizzen)
- Mizzen staysail
- Monkey fist
- Moor
- Mooring
- Motor sailer
- Motor well
- Mould
- Moulds
- Mouse
- Navigation
- Navigation lights
- Neap tides
- Nip
- Nipper
- No room to swing a cat
- Oakum
- Oar
- Offing
- Off the wind
- Oilskin
- On the wind
- Oreboat
- Orlop deck
- Outhaul
- Out-haul
- Outward bound
- Overbear
- Overfall
- Overhang
- Overhaul
- Overhead
- Overreach
- Over the barrel
- Overwhelmed
- Owner
- Ox-Eye
- Painter
- Palm
- Parachute flare
- Parachute spinnaker
- Parallel rules
- Parbuckle
- Parcel
- Parrel
- Part brass rags
- Partners
- Passage
- Pay
- Paymaster
- Pay-off
- Peak
- Pennant
- Pier-head jump
- Pilot
- Pin
- Pinch
- Pintle
- Pipe berth
- Pipe (Bos’n’s), or a Bos’n’s Call
- Pipe down
- Piping the side
- Pitch
- Pitch-pole
- Pitchpole
- Plane
- Plot
- Plug spanner
- Pointing
- Polyethylene
- Pontoon
- Poop deck
- Pooped
- Port
- Porthole
- Port hole
- Port tack
- Position line
- Pound
- Press gang
- Preventer
- Preventer (Gybe preventer, Jibe preventer)
- Principal Warfare Officer
- Privateer
- Privileged vessel
- Propeller shaft
- Propeller walk or prop walk
- Prop rider
- Prow
- Puddening
- Pulpit
- Purchase
- Push pit
- Push rod
- Pusser
- Quarter
- Quarter berth
- Quarterdeck
- Quartering sea
- Quayside
- Queen’s (King’s) Regulations
- Rabbet
- Rabbett/Rebate
- Race
- Rack
- Radar
- Radar reflector
- Radio direction finder (RDF)
- Rafting
- Rail
- Raised deck
- Rake
- Range lights
- Ratlines
- Reach
- Reaching spinnaker
- Ready about
- Reciprocal bearing
- Rectifier
- Red Duster
- Reduced cat
- Reed valves
- Reef
- Reef-bands
- Reef points
- Reef-tackles
- Reeve
- Regatta
- Relieving tackle
- Render
- Rhumb line
- Rib
- Ribs
- Ride at anchor
- Rig
- Rigger
- Rigging
- Righting couple
- Righting moment
- Rigol
- Roach
- Rocker
- Rode
- Roll
- Roller reefing gear
- Rolling-tackle
- Rooster rail
- Rope
- Rope’s end
- Rope yarn
- Round bilge
- Round turn
- Round up
- Rubbing strake
- Rub rail
- Rudder
- Rules of the road
- Rummage sale
- Run
- Running backstay
- Running fix
- Running lights
- Running rigging
- Sag
- Sagging
- Sail-plan
- Saloon
- Saltie
- Sampson post
- Scandalize
- Scantling
- Scarf
- Schooner
- Scow
- Scraper
- Scud
- Scudding
- Scull
- Scupper
- Scuppers
- Scuttle
- Scuttlebutt
- Sea
- Sea anchor
- Sea chest
- Seacock
- Sea kindly
- Seam
- Seaman
- Sea room
- Seaworthy
- Seize
- Self-bailing
- Self-steering
- Self-Unloader
- Sennet whip
- Serve
- Set
- Set flying
- Sextant
- Shackle
- Shaft horsepower
- Shaft log
- Shakes
- Shank
- Shears
- Sheathing
- Sheave
- Sheep-shank
- Sheer
- Sheer strake
- Sheet
- Sheet anchor
- Shell
- Shift
- Shims
- Ship
- Ship’s bell
- Ship’s company
- Shoal
- Shoe
- Shore
- Short board
- Shorten
- Shrouds
- Shy
- Sick bay
- Side lights
- Silencer
- Sills
- Single-handed
- Siren
- Skeg
- Skin friction
- Skipper
- Skysail
- Skyscraper
- Slack
- Slack water
- Slalom
- Slip
- Sloop
- Slop chest
- Slot
- Slush
- Slush fund
- Small bower (anchor)
- Snatch block
- Snow
- Snub
- Sole
- Sonar
- Son of a gun
- Spanish windlass
- Spanker
- Spanker-mast
- Spar
- Spars
- Speed curve
- Spindrift
- Spinnaker
- Spinnaker pole
- Spitfire jib
- Splice
- Spray rails
- Spreader
- Squall
- Squared away
- Square meal
- Squat effect
- Stall
- Stanchion
- Standing
- Standing rigging
- Starboard
- Start
- Starter
- Starting solenoid
- Stay
- Staysail
- Steerage way
- Steering oar or steering board
- Stem
- Step
- Stern
- Stern-board
- Stern-post
- Stern tube
- Sternway
- Stiff
- Stonnacky
- Stops
- Stop valve
- Stow
- Strake
- Stray-current corrosion
- Stringer
- Strip
- Strum box
- Strut
- Strut bearing
- Studding-sails (pronounced ‘stunsail’)
- Supercharger
- Surge
- Sway
- Swell
- Swigging
- Swinging straps
- Swinging the compass
- Swinging the lamp
- Swinging the lead
- Tabernacle
- Tabling
- Tachometer
- Tack
- Tackle
- Taffrail
- Tail
- Tail off
- Tailshaft
- Taken aback
- Taking the wind out of his sails
- Tally
- Tang
- Teazer
- Tender
- Tenon
- Thermostat
- the Ropes’
- Thimble
- Thole
- Three sheets to the wind
- Through-hull connection
- Thrust bearing
- Thwarts
- Tide rode
- Tie down
- Tiller
- Timber
- Timoneer
- Tingle
- Toe rail
- Toe-rail
- Toe the line or Toe the mark
- Togey
- Toggle
- Topgallant
- Topmast
- Topping lift
- Topsail
- Topsides
- Torque
- Torque wrench
- Touch and go
- Tow
- Towing
- Traffic Separation Scheme
- Transom
- Transom cutout
- Transom knees
- Trapeze
- Travellers
- Triatic stay
- Trice
- Trick
- Trim
- Trough
- Trunk cabin
- Trysail
- Tuft
- Tumblehome
- Turn
- Turtling
- Twin screw
- Una rig
- Unbend
- Under the weather
- Underwater hull or underwater ship
- Under way
- Unreeve
- Unship
- Upper berth
- Upper-yardmen
- Upwind
- Vang
- Vanishing angle
- Variation
- Varnish
- V-bottom
- Vector diagram
- Veer
- Ventilation
- V-hull
- Wake
- Wales
- Warp
- Watch
- Watercraft
- Waterlines
- Watertight
- Waterway
- Weather deck
- Weather gage
- Weatherly
- Weather side
- Wedges
- Weigh
- Weigh anchor
- Well found
- Wells
- Wet exhaust
- Wetted surface
- Wheelhouse
- Whip
- Whisker-pole
- Whiskers
- White Horses
- Wide berth
- Winch
- Windage
- Windbound
- Windlass
- Wind-rode
- Windward
- Wing-and-wing
- Yacht
- Yankee jib
- Yard
- Yardarm
- Yarr
- Yaw
- Yawl