- - aircraft's height indicator
- - Aircraft instrument for gauging height
- - Aircraft instrument
- - Skydiving device
- - Height-measuring device
- - Parachutist's device
- - Aircraft device
- - Pilot needs this to be highly accurate
- - Plane's instrument's date shown during change
- - height indicator
- - Pilot's height gauge
- - Instrument measuring height above sea level
- - Highness measurer
- - Cockpit gauge
- - Change round hours and minutes perhaps in measuring instrument
- - Change over years, say, in flying instrument
- - Instrument to measure height above ground
- - Instrument that's taken up
- - Mountain climber's gadget
- - It tells you how much you've 56-Across
- - It tells you how high you are
- - It takes measurements on a plane
- - It works by comparing air pressures
- - Highness guide
- - Servopneumatic instrument
- - Instrument measuring elevation
- - Height gauge
- - Airplane apparatus.
- - Airplane navigation instrument.
- - Climbing gadget
- - Navigation aid
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