The pitot static system provides total and static inputs for the pressure sensing instruments and systems which have functions that vary with altitude and airspeed.

A sample system as show below would have three independent systems referred to as Capt, FO's and Aux. A forth port is connected to supply pressure inputs for the cabin pressure controller. All of the pitot probes are equipped with heaters for anti-icing protection. Along with the ability for the captain or fist officer to select an alternate pressure source.

A simplified sample system is shown below.