"Chris W" wrote in message
news:mKx0f.117$%42.106@okepread06...
If you were about to go on an IFR flight, and for some unknown,
hypothetical reason you had to pick one instrument in the standard six
pack that you could not use, which one would it be?

The DG. Mag compass (not to mention GPS) can be uesd as a backup. If wings
are level and the compass isn't moving, I'm ok on direction and bank.

Michael