Answer: altimeter

AnswerCrossword Clue
ALTIMETERAirplane apparatus.
altimeterAn instrument for determining altitude attained, esp. a barometric or radar device used in an aircraft
altimetera device for measuring altitude
ALTIMETERInstrument that's taken up
ALTIMETERHighness guide
ALTIMETERHeight-measuring device
ALTIMETERChange around tempo for instrument in a cabin (9)
ALTIMETERServopneumatic instrument
ALTIMETERInstrument measuring elevation
ALTIMETERHeight gauge
ALTIMETERIt tells you how high you are
ALTIMETERAirplane navigation instrument.
ALTIMETERParachutist's device
ALTIMETERIt takes measurements on a plane
ALTIMETERMountain climber's gadget
ALTIMETERNavigation aid
ALTIMETERSkydiving device
ALTIMETERAircraft device
ALTIMETERCockpit gauge
ALTIMETERIt works by comparing air pressures