Aback(backwind) - The sail filling on
wrong side in the case of sq rigger may cause the ship to back up.
Abaft towards the stern.
Abeam At right angles to the keel of the boat, but not on the boat.
Able bodied seamen - A member of the deck crew who is able to perform all
the duties of an experienced seamen; certificated by examination; must have
three years sea service. Also called Able Seamen and A.B.
ABS - American Bureau of Shipping: A U.S.-based private
classification, or standards setting society for merchant ships and other marine
Aboard -On or within the boat.
About - on the other tack
Above Deck -On the deck
Abrest - Along side or at right to
Abyss- That volume of ocean lying below 300 fathoms from surface.
Admeasure- Formal measurement of a boat for documentation.
Admiralty law The "law of the sea."
Adrift- Floating free with the currents and tide, not
under control. A rope may be adrift if comes out place.
Aft - At,near or towards the stern
After bow spring line- A mooring line fixed to the bow
of the boat and leading aft where it is attached to the dock. This prevents the
boat from moving forward in its berth. Its opposite, the forward quarter spring
line, is used to keep the boat from moving aft in its berth
.Against the Sun-Anti-clockwise circular motion. Left-handed ropes are
coiled against the sun.
Aground -Touching or fast to the bottom. .
Aid to navigation- Any fixed object that a navigator may use to find his
position, such as permanent land or sea markers, buoys, radiobeacons, and
Altar - Step in a dry dock
Aloft - up above the deck, up the mast or in the rigging
Alongside - Close beside a ship, wharf or jetty.
"Ahoy" - seaman's call to attract attention
America's Cup: The
America’s Cup, dating from 1851, is the oldest trophy in is considered yacht
racing’s Holy Grail.
Amas- The outboard hulls of a trimaran.
Amidships - In the middle of the ship
- A hook which digs in to the bottom to keep the ship from drifting 2)
The act of using an anchor
Anchorage-A sheltered place or area where a boat can anchor.
Anchor Ball - A black ball visible in all direction display in the
forward part of a vessel at anchor.
Anchor bend- A type of knot used to fasten an anchor to its line.
Anchor Chain A chain attached to the anchor. The chain acts partially as
a weight to keep the anchor lying next to the ground so that it can dig in
Anchor Chocks- Deck fitting for storing anchor.
Anchor Detail- Crew at the bow to handle the ground tackle
Anchor Ice-Ice, of any form, that is aground in the sea.
Anchor Light - A white light visible in all direction display in the
forward part of a vessel at anchor.
Anchor Locker-Storage space used for the
anchor rode and anchor.
Anchor Watch - A member or members of the crew that keep watch and check
the drift of ship
Anchor Pocket A recess in the bow for storinganchor
Anchor windlass- A windlass used to assist when raising the anchor
ANTI-TRIP CHINE- A flared out aft section of the side/bottom of the boat.
The purpose is to prevent the hard chine of the boat catching a wake or small
wave on a sharp turn.
Anemometer- A device that measures wind velocity.
Apeak: Said of anchor when cable is taut and vertical.
Apparent Wind-- the direction of the wind as is relative to the speed and
direction of the boat
ASPECT RATIO - The relationship between the height of a sail and its
breadth. i.e. A sail with a height of 30' and a breadth of 20' has an aspect
ratio of 3:2 .A tall and narrow sail is said to have a high Aspect ratio.
Astern - behind the boat
Astrolabe - Ancient navigation instrument a graduated brass ring with a
movable index to measure the altitude of stars to determine latitude.
Ataunt- With all masts up and all sails set.
Athwart: Across. Transversely.
Athwartships -At right angles to the centerline of the boat; rowboat
seats are generally athwartships.
A-trip: Said of anchor immediately it is broken out of the ground.
Auger A carpenter's tool boat builders use for boring holes in wood.
Auxiliary - A second method of propelling a vessel. On a
sailboat this could be a engine.
Avast! - The command to stop, or cease, in any operation.
Aweigh- To raise an anchor off the bottom.
Awash - Water washing over.
Awning. - A
covering of canvas spread over the decks of the
ship, or over a boat, 'in hot weather, to protect the officers and
crew from the heat of the sun. That part of the poop-deck which
. is continued forward beyond the bulk-head of the cabin, is also called the awning.