Dictionary of nautical terms - Splash Maritime

THE SEAFARER'S WORD

A Maritime Dictionary

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Ranger Hope ? 2007- All rights reserved

A: Aa.: Aaaa.: A flag + three numerals: Aback: Abaft: Abaft of the beam: Abandon: Abandon ship: Abate: Able bodied seaman: Abeam: Aboard: About, go: Above board: Able bodied seaman: Abreast: Abrid: Abrolhos:

A.B.S.:

Absorption:

Abt.: Abyss: Abyssal, abysmal: Abyssal gap: Abyssal plain: Access holes: A.C.M.A.: Acid rain:

Ack.:

A

Code flag; Diver below, keep well clear at slow speed.

Always afloat.

Always accessible - always afloat.

Code flags; Azimuth or bearing.

When a wind hits the front of the sails forcing the vessel astern. Toward the stern. Bearings over the beam to the stern, the ships after sections. To jettison cargo. To forsake a vessel in favour of the life rafts, life boats. Diminish, stop. Certificated and experienced seaman, called an AB. On the side of the vessel, amidships or at right angles. Within or on the vessel. To manoeuvre to the opposite sailing tack. Genuine. Advanced deckhand ranked above ordinary seaman. Alongside. Side by side A plate reinforcing the top of a drilled hole that accepts a pintle. A violent wind blowing off the South East Brazilian coast between May and August. American Bureau of Shipping classification society. Able bodied seaman The dissipation of energy in the medium through which the energy passes, which is one cause of radio wave attenuation. About A deep chasm. The greatest depth of the ocean A narrow break in a sea floor rise or between two abyssal plains. A level region at great depth in the ocean. Holes cut in a structure to facilitate entry and exit. Australian Communication & Media Authority The acidification of rain (largely resulting from atmospheric pollution from burning sulphur rich coal) causing forest die back and reduction of quality of water habitats. Acknowledge.

A. class: A. class division:

Accommodation: Accommodation ladder: Accumulator:

A-cock-bill

A.C. current:

Accretion:

Aces: Acorn: Adams, Joe

ADCOM: Added mass:

Added weight method:

Adiabatic: Adj.: Admiral: Admiralty brass: Adrift: Ad valorum: Advance:

Advection:

Advection fog: Admiralty: Admiralty pattern anchor: Adze: Aerial:

Aero lights: Aeronautical drift (Da):

Australian vessel survey class, unlimited offshore. Divisions made of steel or equivalent material, suitably stiffened and capable of preventing the passage of smoke and flame up to the end of the first 1 hour of the standard fire test. The living quarters of a vessel. Portable steps providing access from the vessel's entry deck to the waterline. A tank that smooths out pressure variability in a fresh water system. A trap to remove water within a refrigeration system. A term used to indicate that the anchor is clear of the hawse pipe and suspended above the water, ready for letting go. Alternating current is a form of pulsing electricity supplied by alternators. The voltage cycles between positive and negative at a regulated frequency (cycles per second measured in Hertz). The process of deposition of material at the bottom of the oceans. Build up of matter over a surface (e.g. ice on rigging, fouling on hulls). Hooks for the chains. Decorative finial for a post. Australian prolific fast cruising yacht designer tragically murdered in his late years of life in New Guinea. Address commission. An effective increase in hull mass caused by the dragged waterflow during motion. A method used to determine a ship's damaged stability by calculating a partial flooding as added weight rather than as lost buoyancy. Occurring without heat. Adjust, adjustment. First or highest commander. Alloy of approximately 70% copper, 29% zinc. See Naval brass. A vessel not attached to the wharf or an anchor. A term from Latin meaning, "according to value." The twin vectors of advance (headway/headreach) and transfer are the distance forward and the distance to the left or right that a vessel will make while negotiating a turn (its tactical diameter) or going full astern to avoid a collision (its stopping distance). The horizontal air movement in the lower atmosphere due to difference in atmospheric pressure (wind). Fog resulting from warm air over relatively colder water. Pertaining to the United Kingdom Naval Command. An older style anchor with crown, twin flukes and a stock perpendicular to its shank. Shipwrights tool used to face timber (cut surface to shape). A length of conducting wire that detects and/or over a band of similarly proportional radio wavelengths. Aids to navigation for aircraft. Drift caused by bailout trajectory or aircraft gliding distance.

Aeronautical position:

A.F.F.F.: Affreightment contract:

Afloat: Aframax.: Afromosia:

Aft, after: After body: Aft peak:

Aft peak bulkhead:

Aft peak tank: After Perpendicular (AP):

After rake:

Aftermost: Agba: A.G.D.: A.G.D.66:

Age of the moon: Age of the tide: Agonic line: Aground: Agulhas Current:

A.G.W.: A.H.D.:

Ahead: A-hoy: A.H.L.: A.H.O.: A-hull:

A.I.O.: Air:

Initial position of a distressed aircraft at the time of re-entry, engine failure, aircrew ejection or bailout. Aqueous Film Forming Foam An agreement by an ocean carrier to provide cargo space on a vessel at a specified time and for a specified price to accommodate an exporter or importer. Supported by the surface of the water. The largest dry bulk carriers. African fine straight grained hardwood timber. Dark coloured, easily hand worked and acceptable for marine use. The stern end of a vessel. A vessel's sections aft of amidships. A compartment immediately forward of the stern post usually below the load water line. The transverse bulkhead forward of the stern post, being the forward boundary of the after-peak tank that is required to be maintained as watertight. The furthest aft tank/compartment (used for fresh water or ballast). A line which is perpendicular to the intersection of the after edge of the rudder-post with the designed load water-line. This is the case for both single- and twin-screw merchant ships. For some classes of warships, and for merchant ships having no rudder-post, the after perpendicular is taken as the centre-line of the rudder stock. The angle beyond vertical of the vessel's overhanging stern structure.

Extreme aft end of a vessel. African straight grained hardwood timber durable for marine use. Australian geodetic datum. Australian Geodetic Datum 1966 - the datum used by the Australian Hydrographical Office on Australian Charts which is a different datum used by the GPS. See also `WGS84' The interval since the last new moon. The interval since the last full/new moon and the next spring tide. A line joining points with no magnetic variation. Touching the sea bottom. A warm Indian Ocean current running southward along the East African Coastline. All going well. Australian Height Datum adopted by the National Mapping Council for vertical control for mapping (mean sea level 1966-68). Towards the vessel's bow. Used to attract the attention of another vessel. Australian hold ladders. Australian Hydrographical Office. When a vessel lies perpendicular to the wave fronts. A method of heaving to. Admiralty information overlay. A mixture of mainly nitrogen, with oxygen and carbon dioxide, constituting the atmosphere with races of inert gasses.

Air casing:

Aircraft carrier: Aircraft coordinator (A.C.O.): Air draught: Aircraft glide: Air hammer: Air port: Air-purifying respirator:

Air tank:

Air tight door: A.I.S.: A.L.A.R.P.: Alaska current:

Albatross:

Alden, John:

A-lee: Alertfa: Alert phase:

Alerting post:

Alignment:

Alive: Aliz?: Alkaline:

All fours mooring:

All hands: Allison:

A.L.M.: All standing: Aloft: Alongside: Allotment note:

A.L.P.

An upper deck combing surrounding the funnel stack to protect the deck from heat and assist fireroom ventilation. A warship designed to carry planes. A person who coordinates the involvement of multiple aircraft in SAR operations. Height clearance of a vessel. Maximum ground distance an aircraft could cover during descent. Compressed air (nail or rattle) gun used to remove surface rust. A window to provide light and ventilation. A respirator with an air-purifying filter, cartridge, or canister that removes specific air contaminants by passing ambient air through the air-purifying element. A tank that provides additional vessel floatation. A tank of breathable air for underwater scuba divers. A fully sealed door that will exclude air from passing. Automatic Identification System. As low as reasonably practical. A warm North Pacific Ocean current running firstly Northward along the Alaskan Coastline then West into the Pacific. Large wing spanned ocean wandering seabird, featured in the epic poem the Ancient Mariner. American early 20th century classic yacht designer, associated with N.G. Herreshoff. Away from the direction from where the wind comes from. See alert phase. A situation wherein apprehension exists as to the safety of an aircraft or marine vessel, and of the persons on board. Any facility intended to serve as an intermediary between a person reporting an emergency and a rescue coordination centre or rescue sub-centre. To assemble a shaft in line with its bearing to minimise wear and vibration. A command to be quicker with the task. The trade winds. A compound that is chemically opposite to acid. The electrolyte in Ni-Cad batteries of dilute potassium hydroxide. Anchoring a vessel with two chain cables ahead and two chain cables astern. All the crew. The act of striking or collision of a moving vessel against a stationary object (American). Alarm. To come to a sudden stop. Up the mast or In the rigging. Berthed against a wharf or jetty. Traditional payment option for a seaman to dispose of some of his pay to relatives. Articulated loading platform; a partially buoyant tower rising from a universal joint on the sea floor and used for berthing and loading at

A.L.T: Altar: Alternator:

Aluminium:

Aluminium bronze: A.M.: Amas: A.M.C.: American bureau of shipping: Amidships: Ammeter:

Amp: Ampere:

Amphitrite: Amphora: Amplification: Amp meter: Amplitude:

Amplitude modulation: A.M.S.A.: A.M.V.E.R.: Analogue:

Anchor: Anchorage: Anchor bar: Anchor billboard: Anchor buoy: Anchor chain:

Anchors in tandem: Anchor light: Anchor rode: Anchors aweigh: Anchor stopper:

oil platforms. Altitude. A step in a graving dock. A device consisting of a spinning magnet within a series of coils that produces AC electrical current, subsequently rectified to DC when used for charging vessels batteries. Lightweight corrosion resistant metal used for fittings and hull plating. Alloy of approximately 90% copper and 10% aluminium. Amplitude modulation. The outboard hulls of a trimaran. Australian Maritime College. American ship classification society.

The centre of the vessel, with reference to her length or breadth. An instrument that measures the amount of current, in amperes, in an electrical circuit. A unit of electrical power and abbreviation of ampere. Ampere or amps are the unit of electric current. Amps can be compared to the volume of water flowing through a water pipe. Amps = Volts ? Ohms Ancient Greek consort of Poseidon, God of the sea. An ancient earthenware vessel used to transport liquids. As in making sound louder or a radio wave stronger. See Ammeter: The maximum power of a radio wave. The bearing of a heavenly body expressed in the degrees towards the North or South Pole from East or West sighted at its rising or setting. For example, amplitude E20?N = 90? - 20? = 70?, W20?N = 270? + 20? = 290?. See azimuth. The varying of amplitude to the radio carrier wave to enable encoding for the simulation of audio messages. Australian Maritime Safety Authority. Automated mutual-assistance vessel rescue system. Analogue display, one that uses physical quantities (e.g. length or deflection) to represent numbers. A device that holds the vessel to the sea bottom. A place to anchor. A lever used to work an anchor windlass. A deck housing to stow an anchor. A small buoy used to mark the position of the deployed anchor. Secures the anchor to the ship and ensures that the pull on the anchor is horizontal thus embedding the flukes under tension. Hence the phrase, "a vessel anchors by its chain". Use of two anchors in a line to improve holding power. A white light hoisted while anchored, also known as a riding light. A length of anchor line. Announced when the anchor just clears the bottom at retrieval. A device to lock off an anchor chain.

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