(USN aviation) Radio PROCEDURE WORD, precedes a radio call which applies to a group of aircraft, e.g. "99 Guntrains" would address all aircraft with a Guntrain callsign.

A form of sea life (type unknown) which makes a sound very similar to a propeller turning at 130 rpm.

Anti-Air Warfare.

Anti-Air Warfare Commander.

Backing a sail is turning it so that the wind hits the forward face; the effect is to slow a ship or boat. A sail which is being backed is said to be 'aback.' A sailing ship which accidental [..]

Aft of a given point on a ship; e.g. the bridge is abaft the bow.

The all-attitude indicator on some tactical aircraft, particularly the A-4; provides attitude data in roll, pitch, and yaw. Comes from the AJB-3 designation for the device.

Atomic, Biological, Chemical. An early term, since supplanted by 'NBC'.

(Aviation) A stall which occurs during accelerated flight, i.e. while the pilot is pulling G's. Generally, a much more violent event than a stall occurring during level (unaccelerated) flight.

Backgammon, a board game traditionally played in off-duty hours.