Automatically Deployable Emergency Locator Transmitter. See ELT.

Status of an aircraft that is no longer giving a radar return. The air traffic control screen will display this status (usually with the acronym “CST”) and will temporarily continue displaying the air [..]

See SOCAL (below).

minimum control speed (air). The minimum speed at which control of a twin-engined aircraft can be maintained after failure of one engine.

Vertical Speed Indicator. One of the primary flight instruments showing rate of climb or descent.

Air Accident Investigation Branch of the Department of Transportation of the United Kingdom. Its role is to investigate air accidents. The letters AAIB also refer to equivalent organizations in Icelan [..]

Air Base. More often used when describing a military airport.

Aircraft Communication Adressing and Reporting System

Automatic Direction Finder. Radio compass giving a relative bearing to a NDB.

Attitude Deviation Indicator. Enhanced artificial horizon with pitch and roll information. It is part of a flight director system.