Originally Posted by
cosmokg
3. IVSI a big NO.
If you had decided that IVSI +500 fpm would heed the call; is that still NO for IVSI or rather sensible use of the most precise instrument available?
All under the condition that you need/have to pronounce a "numeric" definiton of positive veritcal. As long as you are happy with the "gut feelin'" description all is well even with Mk1 eyeball/ears. Some actually need to standardize beyond such definiton.
FD (the un-real)