Can you hold over a NDB?

Holding over a Non-Directional Beacon (NDB) is indeed permissible and is a standard aviation procedure. Pilots can use NDBs for navigation and can hold over them when necessary, similar to how they might hold over a VOR. The ability to hold over an NDB allows pilots to maintain their position while awaiting clearances from Air Traffic Control (ATC) or during conditions that may require them to hold for traffic or weather.

In practice, when assigned to hold over an NDB, pilots would typically receive specific instructions from ATC regarding the holding pattern, including the direction of turns and the expected time in the hold. Holding over an NDB provides a reliable reference point, as the NDB signals can be directly tracked with the aircraft's navigation equipment.

The other choices present various limitations that do not align with standard holding procedures. The statement related to emergencies implies that holding is an exceptional condition rather than a standard practice, which isn’t accurate as holding patterns can be executed under normal operational conditions. The option suggesting holding only if requested by ATC overlooks the wider scope of pilot discretion in holding patterns as part of operational protocols in aviation. Overall, holding over an NDB is a recognized and standard procedure that pilots can utilize without additional