What is the maximum length of a leg between two (HA) class VORTACs at FL 290?

The correct answer is based on the established guidelines for the maximum distance between two VORTACs when flying at higher altitudes, specifically at Flight Level 290 (FL 290). For (HA) class VORTACs, the maximum length of a leg, or the distance between two VORTACs, is specified to be 260 nautical miles. This distance helps ensure that aircraft can adequately receive navigation signals for maintaining proper course and situational awareness.

In the context of aviation, VORTACs serve as important navigation aids providing both VOR (VHF Omnidirectional Range) and TACAN (Tactical Air Navigation) signals, making their coverage and operational parameters critical for navigation safety, especially at high altitudes. Distances greater than 260 nautical miles could result in a lapse of navigational signal reception, therefore compromising safety and efficiency during flight operations.