What minimum navigation equipment is required for ifr flight?

For IFR (Instrument Flight Rules) flight, the minimum navigation equipment required typically includes a functioning VOR (VHF Omnidirectional Range) receiver, an ADF (Automatic Direction Finder), and either an RNAV (Area Navigation) system or a GPS receiver capable of IFR operations. Additionally, aircraft must be equipped with a transponder with altitude reporting capability, and pilots must have a means to maintain altitude and heading, such as an attitude indicator and a directional gyro. Compliance with specific regulations may vary based on the aircraft type and operational environment.