What information is required when describing an arc for a VOR-DME/VORTAC/TACAN?

When describing an arc for a VOR-DME (VHF Omnidirectional Range with Distance Measuring Equipment), VORTAC (VOR with Tactical Air Navigation), or TACAN (Tactical Air Navigation), it is essential to provide specific information to ensure accurate navigation and communication. The correct response includes the distance in miles from the NAVAID, the direction from which the aircraft is referencing the NAVAID, and the name of the NAVAID itself.

This information is crucial for several reasons. First, specifying the distance helps pilots establish their current position relative to the NAVAID, which is vital for maintaining situational awareness. The direction indicates the path the aircraft should be following concerning the NAVAID, enabling the pilot to stay on the intended flight path. Including the name of the NAVAID aids in clear communication, especially in busy airspace where multiple navigation aids may be in use.

By providing all three pieces of information—distance, direction, and the name of the NAVAID—pilots can effectively utilize the navigation aids for situational awareness and flight planning.