In article . net,
"Steven P. McNicoll" wrote:

"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?


VSI


I second that. The altimeter is more than adequate as a backup for the
VSI. And when you're trying to damp out phugoid oscillations the
altimeter is actually better than the VSI for judging ascent/descent
because the VSI lags.

rg