"Roy Smith" wrote in message
...

But it's legal to fly those very same approaches with a 30 year old ADF
which points vaguely in the direction of either 1) the radio beacon, 2)
the
nearest T-storm, or 3) some other random propagation anomaly, and an
equally ancient DME which is doing good if it's correct to within 1/4
mile.
Gotta love the FAA. A fine example of why getting all the government
you've paid for is a bad thing.


You can't substitute GPS for ADF on an NDB approach.