Automatic direction finder

Automatic direction finder (ADF). Electronic navigation equipment that operates in the low- and medium-frequency bands.

automatic direction finder (ADF)
Some aircraft are equipped with an ADF receiver. They receive radio signals in the medium frequency band of 190 Khz to 1750 Khz. The ADF receiver can "Home" on both AM radio stations and Non-Directional Beacons.

Automatic Direction Finder (ADF): A radio device that uses radio transmissions from ground stations to automatically indicate the bearing of an aircraft in relation to the ground transmitter.

AUTOMATIC DIRECTION FINDER- An aircraft radio navigation system which senses and indicates the direction to a L/MF nondirectional radio beacon (NDB) ground transmitter.

ADIZ
Automatic Direction Finder
ADLP
Airborne Data Link Processor
ADMINISTRATOR
means the Federal Aviation Administrator or any person to whom he has delegated his authority in the matter concerned ...

ADF - automatic direction finder/finding. Radio compass which gives a relative bearing to the non directional radio beacon to which it is tuned.

ADF. See automatic direction finder.
ADL. See attitude director indicator.

ADF: ≡ automatic direction finder, 14.3.2
AGL: ≡ altitude above ground level, 12.3
Aircraft Owners and Pilots Association: Air Safety Foundation, 21.10
AOPA: ≡ Aircraft Owners and Pilots Association, 21.10 ...

Navigation, Instruments, and Avionics ADF Automatic Direction Finder - an instrument in an airplane which displays the relative bearing to an NDB (see below) -- it essentially "points at the NDB" AI Attitude Indicator (also known as AH - Artificial ...

ADF - Automatic Direction Finder
ADI - Attitude direction indicator
ADS - Automatic dependent surveillance.
AES - Aircraft Earth station.
AFCS - Automatic flight control system.

ADF: Automatic Direction Finder. Radio compass giving a relative bearing to a NDB.
ADI: Attitude Deviation Indicator. Enhanced artificial horizon with pitch and roll information. It is part of a flight director system.

ADF Automatic Direction Finder, a radio navigation instrument. ADF uses AM radio signals. A needle on the instrument points in the direction from which the signal originates.

Non-Directional Beacon or NDB with complementary Automatic Direction Finder (ADF) installed on board
Localizer Type Directional Aid or LDA
Simplified Directional Facility or SDF
GPS - Global Positioning System
TACAN ...

Aircraft carrying simple radio receivers called automatic direction finders (ADFs) tune to these NDB signals. The ADF receiver swings a pointer on the instrument panel that literally points directly to the location of the NDB radio station.

It is a L/MF radio station which transmits a carrier wave with identifier that can be received by an ADF (Automatic Direction Finder) receiver and an indicator in the aircraft to show the direction the station is located.

UHF/VHF Automatic Direction Finding (U/V ADF): An Automatic Direction Finder that determines relative bearing to a transmitter to which it is tuned, in either the UHF band or VHF band.

They work much like a VOR but it determines just the strength of the signal, which is just broadcasted. It then uses the help of an ADF instrument (automatic direction finder) on the aircraft to locate a direction to the station on the ground.

See also: Direction finder, Navigation, Aircraft, Direct, Pilot