<font face="Verdana, Arial, Helvetica" size="2">I've just emerged from reading the US FAR/AIM (sad, but necessary towards the FAA IR). That has some stern warnings about use of GPS, and some very enlightened ones.</font>
It also has some stern warnings about ADF.
"Since ADF receivers do not have a flag to warn the pilot when erroneous bearing information is being displayed, the pilot should continuously monitor the NDB's identification."
We do all do that without fail, don't we?
