pressure altimeter การใช้

This was because the accuracy of the pressure altimeter ( used to determine altitude ) decreases with height.
Barometric-pressure altimeters have a way to set the local atmospheric pressure at a known altitude precisely for this reason.
The captain's secondary ( mechanical ) and the copilot's main electronic pressure altimeters continued to read correctly.
Barometers and pressure altimeters ( the most basic and common type of altimeter ) are essentially the same instrument, but used for different purposes.
Standard practice would entail calling out the readings on the pressure altimeter, which is set according to atmospheric pressure and thereby references the elevation of the actual airport.