For IFR operations off established airways, what is the maximum allowable distance between VOR NAVAIDs in an IFR flight plan?

For IFR operations off established airways, the maximum allowable distance between VOR NAVAIDs in an IFR flight plan is 80 nautical miles. This regulation is in place to ensure that pilots have adequate navigational coverage and can maintain situational awareness during non-airway operations. The 80 nautical mile separation allows for reliable navigation capabilities, ensuring that pilots can receive VOR signals while flying at IFR altitudes.

The distance is crucial, as it provides a margin of safety, allowing pilots to track accurately and avoid potential navigational errors or loss of signal. By adhering to this maximum distance, pilots ensure they can effectively maintain their intended flight path, especially in less densely trafficked or remote areas where VOR coverage may be less frequent.

Understanding this parameter is vital for a commercial pilot as it influences flight planning and adherence to IFR regulations during operations not directly utilizing established airways.