Glossary of Marine Terms
A
- A/S
- AA
- AAAA
- AARA
- Abaft
- Abaft the beam
- Abandon ship
- Abeam
- Able bodied seaman
- Aboard
- Aboveboard
- Abreast
- Abrid
- ABT
- Access Holes
- Accommodation ladder
- Aces
- Acorn
- ADCOM
- Added mass
- Added weight method
- Admiral
- Adrift
- AFFF
- AFFREIGHTMENT
- Afloat
- Aframax
- AFSPS
- Aft
- Aft peak tank
- After body
- After deck
- After frammes
- After peak
- After peak bulkhead
- After perpendicular
- After rake
- Aftermost
- Aground
- AGW
- AHL
- Ahoy
- AIO
- Air casing
- Air draught
- Air Hammer
- Air port
- Air tank
- Air-tight door
- ALARP
- Alee
- Alive
- All hands
- All standing
- Alleyway
- Aloft
- Alongside
- Altar
- Amidship(s)
- Amidships
- AMSA
- AMVER
- Anchor
- Anchor bar
- Anchor billboard
- Anchor cable
- Anchor chain
- Anchor lights
- Anchor stopper
- Anchor watch
- Anchorage
- Anchor’s aweigh
- Angle
- Angle bar
- Angle clip
- Angle collar
- Anneal
- Anode
- ANTHAM
- Antifouling (paint)
- Aperture
- APHIS
- API
- Appendage(s)
- Appendages
- APPS
- Apron plate
- APS
- APTF
- ARAG
- Arbor
- Arch piece
- ARPA
- Ashore
- ASI
- Assemble
- Astern
- ATDNSHINC
- Athwart
- Athwartship
- Athwartships
- ATUTC
- Auxiliaries
- Auxiliary foundations
- Auxiliary machinery
- Avast
- Awash
- Awning
- Aye, aye, sir
B
- Back bar
- Backhaul
- BAF
- Bail
- Balanced frames
- Balanced rudder
- Bale capacity
- Balk
- Ballast
- Ballast keel
- Ballast tanks
- Barbette
- BAREBOAT CHTR
- Barge
- Barnacle
- Base line
- Batten
- Batten down
- Battens, cargo
- BBB
- BDI
- BDN
- Beachcomber
- Beam
- Beam knees
- Beam line
- Beam plate angles
- Beam wind
- Bear a hand
- Bear down
- Bearer
- Bearing
- Becalmed
- Becket
- Bed plate
- BEI
- Belay
- Belaying pin
- Bell suction
- Bells
- Belly strap
- Below
- Bend
- Bending rolls
- Bending slab
- BENDS
- BEP
- Berth
- Berth term
- Between decks
- Bevel
- Bevel square
- BI
- Bight
- Bilge
- Bilge blocks
- Bilge bracket
- Bilge keel
- Bilge plates
- Bilge pump
- Bilge strake
- Bilge well
- Bilges
- Bilgeway
- Bill of lading
- BIMCO
- Bin
- Binnacle
- Birth marks
- Bitter end
- Bitts
- Bitumastic
- BL (1)
- BL (2)
- Black gang
- Blank flange
- Bleeders
- BLG
- Block
- Block and block
- Block and tackle
- BM
- BMP
- BNWAS
- Boat-fall
- BOB
- Body plan
- BOEMRE
- BOFFER
- Boiler
- Boiler casing
- Boiler chocks
- Boiler foundation
- Boiler room
- Bollard
- Bollard pull
- Bolster plate
- Bond port
- Bonded warehouse
- Booby hatch
- Boom
- Boom cradle
- Boom rest
- Boom step
- Boom table
- Boot-topping
- Boot-topping
- Bort flange
- Bosom
- Bosom barb
- Bosom plate
- Boss
- Boss frame
- Boss plate
- Bossingb
- Bos’n
- Bos’n’s chair
- Bos’n’s chestb
- Bos’n’s lockerb
- Bottom plating
- Bottom, outer
- Bounding angle
- Bounding bar
- Bow
- Bow door
- Bow linesb
- Bow rudderb
- Bow thruster
- Bowsprit
- Boxed end
- Boxing the compass
- BPG
- BPQ
- Bracket
- Braze
- Breadth
- Breadth extreme
- Breadth, molded
- Breadth, registered
- Break
- Break ground
- Breakbulk
- Breaker
- Breakwater
- Breaming
- Breast beam
- Breast hook
- Breast rail
- Breasthook
- Bridge
- Bridge house
- Bridge wing(s)
- Bridge, navigating or flying
- Bridges
- Bridle
- Bright work
- BROBb
- Broker
- Brow
- BSG
- BSS
- BSS 1/1
- BT
- Buck frame
- Buckle plateb
- Budy
- Budyancy
- Build-operate-transfer (BOT)
- Building slip
- Bulb angle
- Bulb plate
- Bulb tee
- Bulge
- Bulk cargo
- Bulk carrier
- Bulkhead
- Bulkhead bounding: bar
- Bulkhead deck
- Bulkhead sluice
- Bulkhead stiffeners
- Bull riveting
- Bullnosed bow
- Bulwark
- Bulwark stay
- BUNDLING
- Bunk
- Bunker
- Bunker stays
- BUNKERS
- Buoy
- Buoyancy
- Burr edge
- Butt joint
- Butt strap
- Butterworth
- Butterworth opening
- Buttock
- Buttock lines
- Button
- BWAD
- By the board
- By the head
- By the Run
C
- CAA
- Cabin
- Cable
- Cable layer
- Cable locker
- Cable-laid
- Cable-length
- Cabotage
- Calk
- Calm
- CALM
- Cam
- CAM
- Camber
- Camel
- Cant
- Cant beam
- Cant body
- Cant frame
- Cant frames
- Capesize
- Capsize
- Capstan
- Capstan, steam
- Capstan-bar
- Captain of the Head
- Car carrier
- CARB
- Cardinal pointsb
- Cargo
- Cargo battens
- Cargo boom
- Cargo door
- Cargo hatch
- Cargo port
- Carlines (carlings)
- Carrier
- Cartage
- Carvel built
- CAS
- Case joint
- Casingb
- Cast off
- Cathodic protection
- Caulk
- Caulker
- Cavitation
- CBA
- CBFT (or CFT)
- CBM
- CBP
- CCM
- CCNR
- CCTV
- Ceilingb
- Cellular container ship
- Cellular double bottomb
- Center line bulkhead
- Center lineb
- Centre of buoyancy (CB)
- Centre of flotation (CF)
- Centre of gravity (CG)
- Centreline
- CFG
- CFOb
- CFR
- CFR (or C&F)
- Chafe
- Chafing gear
- Chafing plate
- Chain locker
- Chain locker manger
- Chain locker pipe
- Chain riveting
- Chains
- Chamfer
- Charley Noble
- Chart house
- Chart room
- Chassis
- Check
- Check lines
- Cheeks
- Chemical carrier (Tanker)
- Chief
- Chief mate
- Chock
- Chock boat
- Chock roller
- Chocks
- Choked
- CHOPT
- CHTRS
- CIC
- CIF
- Classification societies
- Cleaning in transit
- Clearance
- Cleat
- Clinchimg pan
- Clip
- Clipper bow
- Close butt
- Club foot
- CMG
- CMID
- COA
- COACP
- Coaming
- COB
- Cockpit
- COD
- Coeffi cients of fineness
- Cofferdam
- Coffin plate
- COG
- COGSA
- Coil
- Coils
- Collar
- Collision bulkhead
- Collision mat
- Colors
- Comehome
- Coming around
- Companion
- Companionway
- Compartment
- Compass, magnetic
- Composite vessel
- COMSAR
- CONCAWE
- Concession
- Conning tower
- CONS
- Conservancy
- Consolidation
- Container vessel
- Contraband
- COP
- Cork fenders
- Corrugated
- Corrugated bulkhead
- COTP
- Counter
- Countersunk hole
- Countersunk rivet
- Cowl
- CP (or C/P)
- CPA
- CPD
- CPR
- CPT
- CQD
- Cradle
- Crater
- Crew’s gangway
- Cribbing
- CRN
- CROB
- Cross curves of stability
- Cross-spall
- Crossheader
- Crossing the line
- Crown
- Crown’s nest
- Crow’s nest
- Crutches
- CSC
- CSM
- CSR
- CSSC
- CST
- CTF
- CTR
- CTU
- Custom broker
- Customhouse
- Cut-water
- Cutwater
- CWA
- Cyclodial propulsion system
D
- D&A
- Dagger
- Dagger plank
- Dakum
- DAPS
- Davit
- Davits
- DDC
- DDP
- DDU
- DE
- Dead ahead
- Dead flat
- Dead light
- Dead rise
- Deadlifht
- Deadlight
- Deadman
- Deadrise
- Deadweight
- Deadweight tonnage
- Deck
- Deck beam dimensions
- Deck button
- Deck height
- Deck house
- Deck lashing strap
- Deck stringer
- Declivity
- Deconsolidation point
- Deep floor
- Deep frame
- Deep tank
- Deep tanks
- DEM
- Demurrage
- Derelict
- Derrick
- DESP
- DET
- Development
- DHDATSBE
- DHDWTSBE
- Diagonal line
- Diesel generator
- Dip
- DISCH
- Displacement
- Distress signal
- Ditty-bag
- DK
- DLOSP
- DMLC
- DNRSAOCLONL
- DO
- DOB
- Dock
- Docking plan
- Dog
- Dog shores
- Doldrums
- Dolly bar
- Dolphin
- DOLSP
- Donkey engine
- DOP
- DOT
- Double bottom
- Double skin
- Double up
- Doubler
- Doubling plates
- Dowel
- Dowse
- DR
- Draft
- DRAFT
- DRAFT (DRAUGHT) (of a vessel)
- Draft , extreme
- Draft marks
- Draft(or draught)
- Draft, aft
- Draft, forward
- Draft, load
- Draft, marks
- Draft, mean
- Drag
- Drain well
- Dredger
- Dressing ship
- Drift angle
- Drift pin
- Drill ship
- Drip pan
- DRK
- Drop strake
- Dry bulk
- Dry dock
- Dry docks
- DSC
- Duct
- Duct keel
- Ductility
- Dumb vessel
- Dungarees
- Dunnage
- DUNNAGE
- Duplicating pipe
- Dutchman
- DWAT (or DWT)
E
- Eagle Flies
- Easy
- EBL
- EC
- ECDIS
- ECSA
- EDI – Electronic data interchange
- EDIFACT
- EEDI
- EETF
- EEZ
- EHQ
- EIU
- Electro-hydraulic
- Electrode
- ELVENT
- EMR
- EMS
- EMSA
- ENC
- End seizing
- End-for-end
- Endurance
- Engine control room
- Engine room
- ENOA
- Ensign
- Entrance
- EOS
- EPA
- EPA
- EPIRB
- EPIRB
- Erection
- ESPH
- ETA
- ETC
- ETD
- ETOPS
- ETS
- ETS
- Even keel
- EVTMS
- EXCOM
- Expansion joint
- Expansion trunk
- Expansion trunks
- EXW
- Eye
- Eye bolt
- Eye plate
F
- Fabricate
- Face plate
- Factory ship
- Fair
- Fairing or Fairing up
- Fairlead
- Fairwater
- Fake
- Fake down
- FAL
- Fall
- Fantail
- FAS
- Fathom
- Fay
- Faying surface
- FD
- FDD
- FDIS
- Feeder service
- Felloes
- Fend off
- Fender
- Ferry
- FEU
- FHEX
- FHINC
- Fid
- Fidley
- Fidley deck
- Field day
- Figurehead
- Fillet
- FILO
- Fin
- FIO
- FIOS
- FIOSLSD
- FIOST
- FIOT
- Fish plate
- FIT
- FIW
- Fixed costs
- FIXING
- Flag State
- Flagstaff
- Flame screen
- Flange
- Flare
- Flare
- Flared bow
- Flat
- Flemish down
- Floating drydock
- Floodable length
- Floor
- Floor plan
- Floors
- Flotsam
- FLT
- Fluke
- Flush deck
- Flush deck hatch
- Flush deck ship
- Flux
- FMC
- FMS
- FO (IFO)
- FOB
- Fodley hatch
- FOFFER
- FOG
- Fog horn
- Fog-bound
- FOQ
- FOR
- Force majeure
- FORCE MAJEURE
- Fore and aft
- Fore peak
- Fore peak tank
- Fore rake
- Fore, forward
- Forebody
- Forecastle
- Forecastle
- Forecastle deck
- Foredeck
- Forefoot
- Forehook
- Forepeak bulkhead
- Forest product carrier
- Forging
- Fork beam
- Formal safety assessment (FSA)
- Forty-foot equivalent unit (FEU)
- Forward
- Forward perpendicular
- FOT
- Foul
- Fouled hawse
- Found
- Founder
- FOW (1)
- FOW (2)
- Fo’c’sle
- FPD
- FPSO
- Frame
- Frame head
- Frame lines
- Frame spacing
- Frame station(s)
- Frames
- FRC
- FREE OUT
- Freeboard
- Freeboard deck
- Freefall lifeboat
- Freeing port
- Freeing ports
- Freight, demurrage, and defence
- Freighter
- FSE
- FSG
- FSI
- FSS
- FSU
- Funnel
- Furrings
- FWAD
- FWDD
- FYG
- FYI
G
- G.I.
- GA
- Gadget
- Gage
- Galley
- Galvanizing
- Gang board
- Gang plank
- Gangway
- Gantline
- Gantry
- Garboard strake
- Garboard strake
- Gas carrier
- Gas free
- Gasket
- Gaskets
- Gateway
- Gather way
- Gauge
- GBS
- Gear
- General arrangement
- GHG
- Gib
- Gilguy (or gadget)
- Gipsey (gypsey)
- Girder
- Girth
- GISIS
- Glass
- Glory hole
- GLS
- GMDSS
- GMPHOM
- GN (or GR)
- GNCN
- GNSS
- GO
- Go adrift
- Golden Slippers
- Gooseneck
- Gouge
- GPC
- Grapnel
- Grating
- Grating
- Graveyard watch
- Graving docks
- GRD
- Green sea
- Grids
- Gripe
- Grommet
- Gross registered tonnage
- Gross tons
- Ground tackle
- Grounding
- Groundways
- Groupage
- GRP
- GRT
- GSB
- GSP
- GTEE
- Gudgeon
- Gunwale
- Gunwale (gunnel)
- Gunwale bar
- Gusset
- Gusset plate
- Gutter ledge
- Gutterway
- Guys
- GZ
H
- HA
- HAEMHF
- Hail
- Half deck
- Half model
- Half-breadth plan
- Half-mast
- Halliards or halyards
- Hand
- Hand lead
- Hand rail
- Hand rope
- Hand taut
- Hand-over
- Handybilly
- Handymax
- Handysize
- Hang from the yards
- Hard patch
- Harpings
- Hatch
- Hatch bars
- Hatch coaming
- Hatchway
- Hawse
- Hawse buckler
- Hawse hole
- Hawse pipe
- Hawse plug or block
- Hawse-pipes
- Hawser
- Hawser-laid
- HCFC
- HDWTS
- Head
- Head ledges
- Head of navigation
- Head room
- Headlog
- Heart
- Heave
- Heave around
- Heave away
- Heave in
- Heave short
- Heave taut
- Heave the lead
- Heave to
- Heaving line
- Heavy-lift vessel
- Heel
- Height
- Helm
- Helm port
- Hemp
- HGWG
- High, wide and handsome
- Hip towing (hipping)
- HMS
- HNS
- HO
- Hog
- Hog frame
- Hog sheer
- Hogged
- Hogging
- Hoist away
- Hold
- Hold beams
- Hold fast
- Holiday
- Holy stone
- Hood
- Hooding-end
- Hopper barge
- Hopper tank
- Horn cleat
- Horning
- Horse latitudes
- Horsepower
- Horseshoe plate
- Hounding
- Hounds
- House
- House flag
- Housing
- Hovercraft
- HP
- HRU
- HSSC
- Hug
- Hulk
- Hull
- Hull down
- Hull girder
- Hurricane
- Hurricane deck
- HW
- HWP
- Hydrofoil
- Hydrographic vessel
- Hydroplane
- Hydrostatic test
I
- I-Beam
- IAAP
- IACS
- IADC
- IAMSAR
- IAPH
- IATA
- IBC
- IBTS
- Ice breaker
- Ice-bound
- ICS
- ICSW
- Idolphin
- IEA
- IFO
- IFSMA
- IHO
- IIP
- ILG
- IMB
- IMDG
- IMHA
- IMO
- IMOSAR
- IMPA
- IMSBC
- Inboard
- Inboard profile
- IND
- Inducement
- Inert Gas
- Inerted
- INF
- Innage
- Inner bottom
- Inner Shell
- Inserted packing red lead
- Integrated tow
- Intercostals
- Intermodal
- INTERMODAL
- IOPC
- IPIECA
- Irish pennant
- IRTC
- ISAN
- ISCC
- ISGOTT
- Isherwood system
- ISOA
- ISPPC
- ISTEC
- ISWG
- ITC
- ITF
- ITOPF
- IU
- IUATUTC
- IUHATUTC
- IWL
J
K
L
- Labor
- Ladder
- Lame duck
- Landing
- Landing craft
- Landing edge
- Landing ship dock
- Landing strake
- Landlubber
- LANE METER
- Lanyard
- Lap
- Lapstrake
- LASH
- LASH (1)
- LASH (2)
- Lashing
- LAT
- Launch
- Lay aloft
- Laying out
- Lazaretto
- Lazy guy
- LDL
- Lee shore
- Leeward
- LEG
- Length between perpendiculars
- Length over all
- Liberty
- Life-line
- Lifeboat
- Lift a template
- Lifting
- Lifting gear
- Light load line
- Light, fixed
- Lightening hole
- Lighter
- Lightship
- Limber chains
- Limber hole
- Limber holes
- Limber strake
- Line
- Line haul
- Liner
- Lines
- Lines plan
- List
- LL
- LMAA
- LNG
- LNG carrier
- Lo-lo (lift on-lift-off)
- LOA
- Load eater line
- Load line markings
- Locker
- Loftsman
- Log book
- Loll
- Longitudinal
- Longitudinal bulkhead
- Longitudinal centre of buoyancy (LCB)
- Longitudinal centre of gravity (LCG)
- Longitudinal stability
- Longshoreman
- Lookout
- Loom
- Loose
- LOP
- Louver
- LOW
- LPG
- LPG carrier
- LRIT
- LS (or LUMPS)
- LSA
- LSD
- LT
- LTI
- LTIF
- Lubber line
- Lug pad
- Lurch
- LW
- LWC
- LYCN
- Lyle gun
M
- M/V
- Machinery
- Madeye
- Magazine
- MAIB
- Main beam
- Main body
- Main breadth line
- Main deck
- Main mast
- Make colors
- Make the course good
- Make the land
- Make water
- Malacca-max
- Man ropes
- Manger
- Manhole
- Manhole
- Manhole cover
- Manifold
- Manila
- Margin plate
- Marlinspike
- Maroon
- Marry
- Mast
- Mast hole
- Mast step
- Mast table
- Master
- Masthead
- Masthead light
- Mats
- Mats
- MB
- MBL
- MBM
- MCA
- MDO (DO)
- MEPC
- MERSAR
- Mess gear
- Messenger
- Messman
- Messroom
- Metacentre
- Metacentric diagram
- Metacentric height (GM)
- Mezzamine financing
- MFAG
- Middle body
- Midship
- Midship area coefficient (CM)
- Midship beam
- Midship frame
- Midship section
- MIN/MAX
- MIO
- MMSI
- MNLO
- MOB
- MOC
- MODU
- MOLCHOPT
- Mold
- Mold loft
- Molded breadth
- Molded depth
- Molded depth
- Molded line
- Molding edge
- Mole
- MOLOO
- Monkey fist
- Monkey island
- Monkey tail
- Mooring
- Mooring line
- Mooring pipe
- Mortise
- Mother Carey’s chickens
- Moulded breadth
- Mousing
- MSC
- MSDS
- MSI
- MSL
- MSL
- MT
- MTC
- MTOTS
- MTSC
- Mud scow
- Mullion
- Mushroom anchor
N
O
- Oakum
- OBO (Oil-bulk ore (carrier))
- OBQ
- OBS
- OCIMF
- OCM
- ODMCS
- ODME
- ODS
- OEL
- OFAC
- Off and on
- Officer of the watch
- Offsets
- Offsets
- OFG
- Ogee
- OHG
- OIC
- Oil bag
- Oil tanker
- Oilskin
- Oiltight
- Oiltight bulkhead
- Old man
- OMC
- OMOG
- On board
- On deck
- On report
- On soundings
- ONI
- OO
- OPA
- OPRC
- Ordinary seaman
- Orlop deck
- ORS
- OSH
- OTF
- Out of trim
- Outboard
- Outboard
- Outboard profile
- Over-all
- Overboard
- Overcarriage
- Overhang
- Overhaul
- Overtaking
- OVID
- OVIQ
- OVMSA
- OWS
- OWS
- Oxidation
- Oxter plate
P
- Packers
- Pad eye
- Painter
- Painting beams
- Painting frames
- Pair masts
- Pale
- Pallet
- Pallet carrier
- Palm and needle
- Panamax Market
- Panting
- Panting stringer
- Parallel midbody
- Paravane
- PARS
- Part
- Partial bulkhead
- Partners
- Pass a line
- Pass a stopper
- Pass down the line
- Pass the word
- Passenger vessel
- PASTUS
- Pay
- Pay off
- Pay out
- Paying
- PC
- PCASP
- PCGO
- PCT
- PDCA
- PDPR
- Peak
- Peak tank
- Peen
- Pelican hook
- Pendant
- PER
- PERDIEM
- Permanent ballast
- Permanent dunnage
- Perpendicular, after
- PFG
- PHPD
- Pier head jump
- Pile
- Pilferage
- Pillar
- Pillars
- Pilot boat
- Pilot house
- Pilot rudder
- Pin
- Pintle
- Pipe layer
- Pipe stanchion
- Pitch
- Pitching
- Pitting
- Plait
- Plan
- Planking
- Plate, furnaced
- Platform
- Platform deck
- Plating
- Play
- PLEM
- Plimsoll mark
- Plug
- Plummer blocks
- Plunging
- PMSC
- POEA
- Point
- Polarity
- Pontoon
- Pooling
- Poop
- Poop deck
- Pooped
- Poppets
- Port
- Port gangway
- Port hole
- Port lid
- Port of Registry
- Port side
- Port State Control
- Pouring oil on troubled waters
- PPD
- PPE
- Pratique
- PRATIQUE
- Preentry
- Preventer
- Prick punch
- Pricker
- Privileged vessel
- Product tanker
- Prolonged blast
- Propeller
- Propeller arch
- Prow
- PSI
- PSIG
- PSR
- PTC
- PTD
- Pull-out manoeuvre
- Pump dale
- Punch, center
- Punt
- Purchase
- Pusher tug
- Put to sea
- PV valve
- PWSA
Q
R
- Rabbet
- Rail
- Rail-mounted gantry (RMG) or rail-mounted container gantry crane
- Railing(s)
- Rake
- RAM
- Ram bow
- Ramp
- Range
- Range, galley
- Ratline
- RCDS
- RCVR
- Reach
- Reachrod
- Reachrod
- Reaming
- RECAAP
- Reef
- Reefer
- Reeve
- Refrigerated vessel
- Registry
- Relay
- Relief
- Research vessel
- Reserve buoyancy
- Reverse frame
- REVERSIBLE (Detention)
- RIB
- Ribband
- Ride
- Ride control
- Rider frame
- Rider plates
- Rig
- Rigging
- Right
- Ringbolt
- RIO
- Rips
- Rise and shine
- Rise of bottom
- Rising floors
- Rivet
- Rivet spacing
- Riveting chain
- RMRGC
- RNC
- RNLI
- Ro-Pax
- Ro-Ro
- Roaring forties
- ROB
- Roll
- Roller fairleader
- Rolling chocks
- RPS
- RRS
- RT
- Rubber-tired gantry (RTG) or rubber-tired container gantry crane
- Rubrail
- Rudder
- Rudder bands
- Rudder chains
- Rudder flange
- Rudder frame
- Rudder pintle
- Rudder post
- Rudder stock
- Rudder stop
- Rudder truck or case
- RUF
- Run
- Run down
- Running lights
- Running lights
- Rustbucket
S
- Sacrificial anode
- Safety of Life at Sea (SOLAS)
- Sagged
- Sagging
- Sailing free
- SALM
- Salty character
- Salvage
- Salvage tug
- SAMHSA
- Samson posts
- SART
- SART
- SATPM
- SATV
- SB
- Scale
- Scantling
- Scantlings
- Scarfing
- SCBA
- SCBRA
- School
- Scow
- Screen bulkhead
- Scrieve board
- SCUBA
- Scupper
- Scupper hose
- Scupper lip
- Scupper opening
- Scupper pipe
- Scuppers
- Scuttle
- Scuttle butt
- Scuttle butt story
- SD (or SID)
- SEA
- Sea anchor
- Sea chest
- Sea dog
- Sea going
- Sea lawyer
- Sea painter
- SEAFREIGHT
- Seam
- Seamstrap
- Seaworthy
- SECA
- Section
- Secure
- Secure for sea
- SEEMP
- Seize
- SELFD
- Semaphore
- SENC
- Serrated frame
- Set bolt
- Set iron
- Set the course
- Set up
- Set up rigging
- Sett piling
- Settle
- SF
- SFG
- Shackle
- Shaft
- Shaft alley
- Shaft coupling
- Shaft pipe
- Shaft strut
- Shaft tunnel
- Shake a leg
- Shakedown cruise
- Shanghaied
- Shape
- Shape a course
- Shaping
- Shear legs
- Shear line
- Shears
- Sheave
- Shed (also see warehouse)
- Sheer
- Sheer plan
- Sheer rail
- Sheer strake
- Sheet
- Shell
- Shell expansion
- Shell landings
- Shell plating
- Shelter deck
- SHEX
- Shift of butts
- Shifting beam
- Shim
- SHINC
- Ship
- Ship chandler
- Ship routing
- Ships time
- Ship’s log
- Ship’s tackle
- Shole
- Shore
- Short stay
- Short ton
- Shorthanded
- Shot
- Shove in your oar
- Shrouds
- Shuttle tanker
- Side keelson
- Side lights
- Side loader
- Sight edges
- SIGTTO
- Sing out
- SIRE
- Sister hooks
- Skeg
- Skids
- SKIDS
- Skin
- Skipper
- Sky pilot
- Skylight
- SL
- SLA
- Slack
- Slack water
- Slamming
- SLF
- Sliding ways
- Slip
- Slop chest
- Slop chute
- Sluice
- Slush
- Smart
- SMC
- Smokestack
- Smothering lines
- SMT
- SNAME
- Snibs
- Snipe
- Snub
- Sny
- SOA
- SOC
- SOF
- Soft plate
- SOHSP
- SOLAS
- Sole patch
- Sole plate
- SOP
- Sound
- Sound out a person
- Sounding
- Sounding
- Sounding pipe
- Southwester
- SP
- Span
- Spanner
- Spar
- Sparks
- SPC
- Speak
- Specific gravity
- Specifications
- Spectacle frame
- Spiling
- Spill
- Splice
- SPM
- SPM
- SPMOMG
- Sponson
- Spote-faced
- Spotting
- Spreader
- Spring line
- Spud
- Spud
- Spudwell
- Spudwell
- Squall
- Square frame
- Squeegee
- SRBL
- SRML
- SSAS
- SSBA
- SSHEX (or SATSHEX)
- SSHINC
- SSRS
- Stabiliser(s)
- Stability
- STABILITY
- Stack
- Stackcar
- Stacktrain
- Stagger
- Staging
- Stanchion
- Stand by
- Standard compass
- Standing part
- Standing rigging
- Stapling
- Starboard
- Stateroom
- Static load
- Station bill
- Staunch
- Stay
- Stays
- STCW
- Steady
- Stealer or steeler
- Steerage way
- Steering flat
- Steering gear
- Steering gear flat
- Steering wheel
- Stem
- Stem foot
- Stem the tide
- Stepping-up pieces
- Stern
- Stern anchor
- Stern board
- Stern door
- Stern frame
- Stern pipe
- Stern post
- Stern ramp
- Stern thruster
- Stern tube
- Sternlog
- Sternlog
- Stevedore
- Stiffener
- Sto-ro
- STOLGOE
- Stop water
- Stopper
- Storeroom
- Storm warning
- Stove
- Stow
- Stowage factor
- Stowaway
- Straddle carrier
- Strake
- Strand
- Strap
- Streamlined rudder
- Stringer
- Stringer plate
- Strip theory
- Stripping (unstuffing)
- Strongback
- Strut
- STS
- STW
- SUB
- Suezmax
- SUPERCARGO
- Superstructure
- Surge
- Swab
- SWAD
- Swage
- Swamp
- Swash bulkhead
- Swash bulkhead (plate)
- Swash plates
- SWDD
- Swell
- Swing ship
- Swinging over
- SWL
- SWL
- Syncrolift
T
- Tackle
- Taffrail log
- Tailshaft
- Take a turn
- Take in
- Taking on more than you can carry
- Tank top
- Tanker
- Tanks
- Tare weight
- Tarpaulin
- Taut
- TCPA
- Tee bar
- Telegraph
- Template
- Tenon
- Test head
- TEU
- That’s high
- Thimble
- Tholes
- Thread
- Three sheets to the wind
- Throwing a Fish
- Thrust block
- Thwart
- Thwarts
- Thwartships
- Tie plates
- Tiller
- TLV
- TM
- TMSA
- Toe
- Toggle
- Toggle pin
- Tongue
- Tonnage
- Tonnage openings
- Tonnage, gross
- Tonnage, net
- Tonnes per centimetre immersion (TPC)
- Top breadth lines
- Top-heavy
- Topping lift
- Topside
- Torsional strength
- Tow
- Towage
- TPA
- TPRG
- TPSG
- Track
- Tractor propulsion
- Trades
- Tramp line
- Transhipment
- Transom
- Transom beam
- Transom frame or plate
- Transverse
- Transverse
- Transverse bulkhead
- Transverse planes
- Transverse sections
- Transverse stability
- Trawler
- TRCF
- Tread
- Treenails
- Trice
- Tricing line
- Trick
- Trim
- Trip
- Tripping brackets
- Tripping line
- Truck
- Trunk
- Trunk bulkhead
- Try square
- TSGB
- TSS
- TTL
- Tuck
- Tug
- Tug boat
- Tumble home
- Turn in all standing
- Turn to
- Turn turtle
- Turnaround time
- Turnbuckle
- Turnbuckles
- Turrets
- TW
- Tween decks
- Tween-deck
- Twenty-foot equivalent unit (TEU)
- Two blocks
U
V
W
- Waist
- Wake
- Wales
- Wardroom
- WASP
- Waste
- Watch cap
- Watch officer
- Water breaker
- Water lines
- Water-logged
- Waterline
- Waterlogged
- Watertight
- Watertight bulkhead
- Watertight compartment
- Watertight door
- Waterway
- Waterway bar
- Water’s edge
- Waybill
- Ways
- WCCON
- WCDC
- Weather deck
- Weather eye
- Weather side
- Weathertight
- Web
- Web frame
- Weeping
- Weigh
- Weigh anchor
- Welding
- Welding bead
- Well
- Well deck
- Well enough
- WGS84
- Whaler
- Wharf
- Wharfage
- Wheel
- Where away
- Whipping
- White cap
- WIBON
- Wide berth
- WIFPON
- Wildcat
- Winch
- Wind scoop
- Windlass
- Wing
- Wing brackets
- Wing passage
- Wing tank
- Wing tanks
- Wiper
- WIPON
- Wire mesh bulkhead
- WLTOHC
- WOG
- WPD
- WRIC
- WTF
- WWD
- WWR
- WWWW