ICAO, Aeronautical Telecommunications, Vol. I Radio Navigation Aids, Annex 10, Radio Navigation Aids, Edition 8, Ammendment 93, July 2023. (icao.int [abgerufen am 2. September 2025]).
ICAO, Aeronautical Communication, Annex 10, Volume IV, Surveillance and Collision Avoidance Systems, Edition 5, Amendment 91, 3. November 2022. (icao.int [abgerufen am 2. September 2025]).