QHH, QFE, millibars, hectopascals, inches, feet, metres - professionals adapt to the local requirement.
Although:
I'd posted this before but a good, and potentially lethal, example of mixed units and shortcuts:
Years ago whilst flying AEF Chipmunks at Cambridge on day off, US multi-piston appears on horizon considerably below nominal 3deg slope.
USMP: Cambridge, say again the altimeter.
C: 992
USMP: 29.92in?
C: Negative, 992mb
USMP:
