An aircraft generally needs a special onboard direction-finding instrument to use a ground VDF service.
Answer
false
Explanation
VDF is a ground-based facility that determines the direction of an aircraft’s VHF transmission. The aircraft generally needs a VHF radio to transmit, rather than a special onboard direction finder. **Key takeaway:** VDF direction finding is performed on the ground.\n\n**Glossary:** **VDF**: VHF direction finder.