S(he) uses an altimeter which a kind of airborne barometer.
These days with GPS. They used to use an altimeter, or geometry (lines of sight from known locations (typical surveyor's work)).
An altimeter
The pilot checked the altimeter to be sure the plane had reached the optimum altitude before the skydivers were allowed to jump. Most altimeters have to be set to local air pressure to correctly determine the plane's height above the ground.
Distance.
Its the altimeter
An altimeter actually measure brometric (atmospheric) pressure, which converts to height above sea level
what are all the instruments use to measure altitude
it's the standard pressure at which all pilots set their altimeter, when communicating Fight Levels.
An altimeter.
S(he) uses an altimeter which a kind of airborne barometer.
Haga is the brand name. An altimeter is used to measure altitude, which is how high you are above sea level.
An altimeter is an instrument to measure the altitude.
With their altimeter. An instrument on the craft's dashboard, called an altimeter, reads the altitude of the craft. In addition, every airfield has a designated altitude above Mean Sea Level assigned, to help calibrate and interpret actual altitudes above ground level.
to measure their altitude
To provide a better vertical separation of all aircraft.
An altimeter (altitude meter) tells the pilots how high the aircraft is flying. There are 2 types of altimeters commonly used in aircraft: pressure altimeters and radar altimeters.