Travis Marlatte wrote:


You've gone off on several lines of reasoning that have led to nowhere.

Sam, it might very well be an oversight that there is no regulation
requiring IFR-certified GPS. It might very well be the intent of the FAA
that such a thing is required. They may change that in the future.

All this debate and all of your non-regulatory examples has convinced me
even more that no such regulation exists.

No such regulation is required. The FAA has made it clear through
policy, directives, and avionics specifications. There are also ICAO
international navigation policies.

You may poo poo all that, but in an enforcement proceeding the FAA would
win, hands down with what they have today.