Aero-Terms are designed to be a daily reminder of the terms,
names, acronyms and explanations of the unique language that
populates the aviation world. Aerospace, sport aviation, fixed
wing, helo, you name it... it's all fair game.
Aero-Terms should serve as a quick but intriguing reminder of
the terms you may use every day, or an introduction to an aspects
of the Aero-World you may not yet be familiar with. ANN also
encourages readers to go beyond the FMI link, and further research
any intriguing terms.
Headings provided to aircraft by facilities equipped with
direction finding equipment. These headings, if followed, will lead
the aircraft to a predetermined point such as the DF station or an
airport. DF guidance is given to aircraft in distress or to other
aircraft which request the service. Practice DF guidance is
provided when workload permits.