#altimeter  an instrument that measures the height above ground; used in navigation
  supertype:  measuring_instrument__measuringinstrument__measuring_system__measuringsystem__measuring_device__measuringdevice  instrument that shows the extent or amount or quantity or degree of something
  part:  aneroid_barometer
  subtype:  hypsometer  an altimeter that uses the boiling point of water to determine land elevation

No statement uses or specializes altimeter; click here to add one.