Title: Interpret altimeter readings and settings.
Course: Aircraft Pilot Training I (20053-I) > Section: Examining Aircraft Instruments, Components, Systems, and Performance

Interpretation should include the following:

- There are two means by which the altimeter pointers can be moved. The first is a change in air pressure; the other is an adjustment to the barometric scale.
- When the aircraft climbs or descends, changing pressure within the altimeter case expands or contracts the aneroid barometer. This movement is transmitted through mechanical linkage to rotate the pointers.

PLT041