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 [..]

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 [..]

Emergency Locator Transmitter. Small radio transmitter fixed on the aircraft’s structure, automatically activated by impact or water immersion, transmitting a code enabling SAR satellites or search un [..]

Visual Approach Slope Indicator System. A colored light system providing visual guidance to the glidepath of a runway.

A

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