What action should be taken if an ADF receiver fails during flight?

If an Automatic Direction Finder (ADF) receiver fails during flight, utilizing GPS as an alternative navigation method is a valid response. GPS provides precise positioning information and can be used effectively to maintain situational awareness and navigation, especially when flying under instrument flight rules (IFR).

When an ADF fails, it is crucial to have a backup navigation source to ensure that the flight can continue safely to the intended destination or alternate. GPS systems are widely available in modern aircraft and offer reliable navigation capabilities, including route planning and real-time location tracking.

Switching to VOR could also be a viable option, but the preference for GPS stems from its enhanced functionality and accuracy in many cases. Returning to base may not be practical or necessary unless the failure compromises the flight's safety significantly. Ignoring the failure is not advisable, as it leaves the pilot without an important navigational tool, potentially jeopardizing the flight.