On Sat, 26 May 2007 19:48:19 GMT, Judah wrote:

Ron Rosenfeld wrote in
:

So far as the restriction people have been stating having to do with not
being able to use the uncertified GPS units as a substitute for ADF/DME,
that stems from the AIM (1-2-3) (and possibly a change that has not been
published) restricting this type of usage to units that are compliant
with AC90-100.

Ahh... Now I get why I didn't see it.

But the AIM is not regulatory, is it?

If it is, it's a stupid rule. One of the ILSs at my home airport actually
requires an ADF. What a pain.

Yeah, but there isn't any regulation allowing substitution of GPS for other
NAVAID's.

I think the AIM revision was just published today on the FAA web site. I
find it pretty confusing in terms of which units are allowed to do what.
--ron