Part of a pilot’s qualification is that they are able to fly purely off of the information provided by their instruments. Just as important as this, if not more important, is the ability to recognize errors and malfunctions of those same instruments. Only once a pilot has complete knowledge of their aircraft’s instruments can they safely take flight. Many aircraft flight instruments operate through a pitot-static system. Instruments of this type are usually used to determine factors such as airspeed, mach number, and altitude.