Which type of pressure does the pitot-static system utilize to measure altitude?

The pitot-static system in an aircraft serves a vital role in measuring both airspeed and altitude by utilizing a combination of dynamic and static pressures. Dynamic pressure is derived from the airflow around the aircraft, which is sensed through the pitot tube. This tube captures the moving air to determine the aircraft's speed. Static pressure, on the other hand, is measured from the static ports on the aircraft and refers to the ambient atmospheric pressure around the aircraft.

When it comes to altitude measurement, the static pressure is crucial. The altimeter interprets the changes in static pressure to reflect changes in altitude, utilizing the relationship between pressure and altitude as defined by the barometric formula. In combination, both dynamic and static pressures are essential for providing precise flight data.

While static pressure alone is used for altitude measurement, the system as a whole operates based on both types of pressure—thus making the correct answer the involvement of both dynamic and static pressures in its functionality. This allows for an accurate readout of performance parameters, essential for safe and effective flight operations.