What is required for VOR equipment before use in IFR operations?

For VOR equipment to be used in IFR operations, it is indeed required to be checked and inspected under an approved procedure. This ensures that the equipment is functioning accurately and reliably, which is crucial for maintaining safe navigation in Instrument Flight Rules conditions. VOR (VHF Omnidirectional Range) systems must meet specific operational standards set by the FAA, which include routine checks to verify that the equipment provides correct course information.

Routine checks help to identify any issues that may affect the accuracy of the VOR signals, ensuring that pilots can depend on them for navigation. These checks often involve a VOR receiver check, which can be performed using a ground-based VOR station or by using specific procedures for self-checking the equipment. By adhering to these approved procedures, pilots ensure compliance with regulations and the safety of their flights.

Other options, while they may touch on important aspects of operational safety and equipment maintenance, do not capture the regulatory requirement as directly and specifically as the correct choice. The requirement for checks under an approved procedure is fundamental to IFR operations involving VOR equipment.