Automatic direction finder

{
  "id": "MLC-T-AVN-000163",
  "term": "Automatic direction finder",
  "field": "Aviation and air traffic control",
  "definition": "An aircraft radio navigation system which senses and indicates the direction to a L/MF nondirectional radio beacon (NDB) ground transmitter. Direction is indicated to the pilot as a magnetic bearing or as a relative bearing to the longitudinal axis of the aircraft depending on the type of indicator installed in the aircraft. In certain applications, such as military, ADF operations may be based on airborne and ground transmitters in the VHF/UHF frequency spectrum.",
  "abbreviation": "ADF",
  "see_also": [
    "Bearing",
    "Nondirectional beacon"
  ],
  "references": [
    "FAA Pilot/Controller Glossary"
  ],
  "url": "https://mlchart.com/terminology/aviation/automatic-direction-finder/"
}