Which instrument may use the static pressure to provide altitude measurements?

The instrument that uses static pressure to provide altitude measurements is the altimeter. Altimeters function by measuring the atmospheric pressure surrounding the aircraft. As an aircraft ascends, the air pressure decreases, and the altimeter is designed to interpret this change in static pressure as a change in altitude above sea level. Specifically, it utilizes a calibrated aneroid barometer that expands or contracts in response to variations in atmospheric pressure, allowing the pilot to read the altitude on the dial.

Understanding the principles of how the altimeter operates is crucial for pilots, as accurate altitude readings are vital for safe flight operations, particularly in terms of maintaining proper flight levels and avoiding terrain or other aircraft. The correct response highlights the essential role of static pressure measurements in altitude determination, distinguishing the altimeter from other instruments that serve different functions.