Thank you for the various contributions to " Sensitive Altimeter" suggestion. It would only have been of benefit as a possible attention getter once stalled.
As an ignorant newbie I sat myself in PF's seat on 5th. Aug. last year Thread 5. #1577 to see how I would feel in his circumstances. ( I have learned a lot since, thanks to the very wide ranges covered by contributors to PPRUNE.)
For Lyman and others I used "...A/P Off.." as a shorthand for " not functioning at the moment whatever the position of a switch" !