Once upon a time, back in the old days of VHF navigation, you could hop into any airplane and you’d know how to operate the avionics. Sure, there were some nuances and an occasional oddity, but for the most part you could tune any radio to communicate and navigate.
Those days are over with today’s PFDs (primary flight displays—”glass”), MFDs (multi-function displays) and GPS navigators that are nearly as capable as airliner flight management systems. On your first foray into all that glass, you’re probably as lost as (to borrow a phrase) a dog watching television.
