For operations off established airways at 17,000 MSL, what is the maximum distance that the VORTAC used should be from the aircraft?

The correct distance for operations off established airways at 17,000 MSL is 200 nautical miles from the VORTAC. This guideline is based on the capabilities of the VORTAC navigation aids and the reliability of the signal they provide at higher altitudes. At 17,000 feet mean sea level, the line of sight and the propagation of VHF signals dictate that the operational range before experiencing signal degradation or loss is effectively 200 nautical miles. This is important for pilots to ensure they maintain navigational accuracy, avoid becoming disoriented, and enhance safety when flying in less structured airspace. Understanding this maximum distance helps pilots plan their routes and ensure they remain within effective communication and navigation parameters when operating away from standard airways.