What is the primary function of the Pitot-Static system in aircraft?

The primary function of the Pitot-Static system in aircraft is to measure both altitude and airspeed. This system operates by using two types of pressure; dynamic pressure, which is captured by the Pitot tube, and static pressure, obtained from static ports. The Pitot tube measures the impact pressure of the airflow, which is directly related to airspeed. The static ports measure the ambient air pressure, which is used to determine altitude.

The combination of these two measurements is pivotal for the operation of essential flight instruments such as the airspeed indicator and the altimeter, enabling pilots to maintain control of the aircraft during flight by providing critical information regarding the aircraft's performance and environment. Thus, the Pitot-Static system is integral for operational safety and effective navigation.