ADF

Automatic Direction Finder

In the context of aviation and aerospace, an Automatic Direction Finder (ADF) is a radio navigation system that uses a directional antenna to determine the direction of a nearby radio transmitter, typically a Non-Directional Beacon (NDB). The system is used to help pilots and navigators determine their bearing, or direction, relative to the transmitter.

Automatic direction finding

In the context of aviation and aerospace, "Automatic Direction Finding" (ADF) refers to a navigation system used by aircraft to determine their bearing (direction) from a known radio transmitter, typically a Non-Directional Beacon (NDB). The system is called "automatic" because it uses an automatic antenna system to determine the direction of the signal.