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Abeam
At right angles to the centerline of the outside of a ship
Adrift
Loose from moorings or out of place
All Hands
Entire ship's company, both officers and enlisted personnel
Anchor Detail
Group of ship's personnel who handle ground tackle when the ship is anchoring or getting underway
Astern
Toward the stern; an object or vessel that is abaft of another vessel or object
Ballast
Heavy weight in the hold of a vessel to maintain proper stability, trim, or draft
Barque
A type of sailing vessel with three (or more) masts, fore-and-aft sails rigged on the aftermost mast and square sails rigged on all other masts
Beam
Width; breadth; the greatest athwartships width of a vessel
Bearing
Direction of an object expressed in degrees either as relative or true bearing
Belay
To cancel an order; to stop; to firmly secure a line
Main Deck
Highest complete deck extending from stern to stern and from side to side
Marlinspike
Pointed iron instrument used in splicing line or wire
Mooring
Securing a ship to a pier, buoy, or another ship; anchoring with two or more anchors
Officer on Deck/Officer of the Day
The officer on watch in charge of the ship when moored or anchored
Pilot
An expert who comes on board ships in harbors or dangerous waters to advise the captain as to how the ship should be conned; a person who controls an aircraft
Quarter
That part of ship's side near the stern
Rudder
A flat, vertical, mobile structure at the stern of a vessel; used to control the vessel's heading
Scuttle
Small opening through hatch, deck, or bulkhead to provide access; similar hole in side or bottom of ship; cover for such an opening; to sink a ship intentionally by boring holes in the bottom or by opening sea chest
Secure
To make fast: to tie; an order given on completion of a drill exercise, or evolution, meaning to withdraw from corresponding stations and duties
Side Lights
Red and green running lights carried on port and starboard sides, respectively
Slack
The part of a line hanging loose; to ease off, state of the tide when there is no horizontal movement
Sound
To measure depth of liquids in oil tanks, voids, blisters, and other compartments or tanks
Spring Line
Mooring line leading at an angle of about 45 degrees off centerline of vessel; to turn a vessel with a line
Starboard
Right side of a ship looking forward
Stern
After part of a ship
Tide
The vertical rise and fall of the sea caused by gravitational effect of sun and moon
Wardroom
Officer's mess and lounge aboard a ship
Watch
A period of duty, usually of four hours duration
Waterline
Line painted on hull showing point to which ship sinks in water when properly trimmed
Watertight Integrity
System of keeping ship afloat by maintaining water tightness
Weather Deck
Portion of main, forecastle, poop, and upper decks exposed to weather
Bilge
Lower part of a vessel where wastewater and seepage collect
Bitt
Strong iron post on ship's deck for working / fastening lines; invariably in pairs
Bitter End
The utmost end of a line
Bow
The forward section of a vessel
Breast Line
A mooring line running at right angles from the ship's fore-and-at line
Bridge
Raised platform from which the ship is steered, navigated, and conned
Bulkhead
One of the vertical wall-like structures enclosing a compartment
Buoy
Floating marker anchored by a line or chain to a sinker on the bottom which by shape and color conveys navigational information; may be lit or unlit and may be equipped with whistles, bells, gongs, AIS, or RACON
Cardinal Point
One of the four principle points of the compass - north, east, south, west
Carry On
An order to resume work or duties
Chain Locker
Compartment in which chain cable is stowed
Cleat
A small metal deck fitting with horns; used for securing lines; also called belaying a cleat. Short piece of wood nailed to brow or gangplank to give surer footing
Conn
To direct helmsman as to movement of helm, especially when navigating in narrow channels or heavy
Coxswain
Enlisted member in charge of a boat acts as helmsman. Pronounced "Kok sun"
Cutter
A Coast Guard vessel sixty-five feet in length or longer with overnight accommodations; a type of sailing vessel
Damage Control
Measures necessary to keep ship afloat, fighting, and in operating condition
Dead Ahead
Directly ahead of the ship's bow; bearing 000 degrees relative
Dog
Metal fitting used to secure watertight doors, hatch covers, scuttles, etc.
Double Up
To increase the number of ship-to-pier turns of a mooring line
Draft
Depth of water from the surface to the ship's keel; a detail of crew members
Engineer of the Watch
An officer in charge of the engineering department while on watch
Fantail
Main deck section in the after part of a flush-deck ship
Fathom
A six-foot unit of length
Fender
Canvas, wood, rope gear, or old rubber tire used over the side to protect a ship from chaffing when alongside a pier or another ship
Fore and Aft
Running in the direction of the keel
Forecastle
Upper deck in the forward part of the ship; pronounced "foke-sul," abbreviated fo'esle
Foul
Jammed, not clear for running
Frame
Ribs of a vessel
Halyard
Line used for hoisting flags, pennants, or balls
Hatch
An opening in the ship's deck for communication or for handling stores and cargo
Hawsepipe
The steel castings in the bow through which anchor cables run
Hawser
Heavy line, 5 inches or more in circumference, used for heavy work
Heave
To throw or toss; to pull on a line
Heel
To list over
Helmsman
The person at the wheel; the person who steers the ship
Hull
Framework of a vessel, together with all her decks, deckhouses, inside plating or planking, but exclusive to masts, rigging, guns, and all superstructure items
Inboard
Toward the ship's centerline
Keel
Backbone of a ship; running from stern to sternpost at the bottom
Amidships
In the middle portion of ship, along the line of the keel
Knot
One nautical mile per hour; a knob, tie, or fastening formed with rope
Ladder
In a ship corresponds to stairs in a building
Landmark
Any conspicuous object on shore, used for piloting
Lee
Direction away from the wind
Muster
To assemble the crew; roll call
Pitch
The forward heaving and lunging motion of a vessel at sea
Running Lights/Side Lights
Lights required by law to be shown by ship or plane when underway between
Deck
On a ship corresponds to the floor of a building on land
Fake
A single turn of line when line is coiled down
Abaft
Behind or further aft
Aft
In, near, or toward the stern
Aground
Resting on or touching the ground or bottom
Ahead
Forward of the bow
Anchorage
Suitable place for a ship to anchor. Area of a port or harbor
Anemometer
Instrument to measure wind velocity
Athwartships
At right angles to the fore and aft of centerline of a ship
Barometer
Instrument that registers atmospheric pressure; used in forecasting weather
Line
Seagoing term for rope or cable
Magazine
Compartment used for stowage of ammunition and explosives
Nautical Mile
6,076 feet or 2000 yards; one minute of latitude
Outboard
Toward the side of the vessel, or outside the vessel entirely
Overhead
On a ship, equivalent to the ceiling of a building ashore
Port
Left side of the ship facing forward; a harbor; an opening in the ship' side
Rack
A sailor's bed
Roll
Side-to-side motion of a ship to sea
Screw
The propeller; the rotating bladed device that propels the vessel through the water
Standby
Preparatory order meaning "get ready" or "prepare to"