Pitot static system is a complete system, which is used to calculate Airspeed, Mach no, Altitude, altitude trend. This system generally consist of a pitot tube, a static port and a pitot static instrument. To understand the pitot static system we first need to understand pressure. In fluids there are 3 types of pressure- static, dynamic and total pressure or stagnation pressure. Static pressure is the pressure exerted perpendicular to a surface. dynamic pressure is the pressure of air in the direction of motion. Total pressure is the sum of dynamic and static pressure. The static pressure gives the altitude of the aircraft during fligh because as altitude increases the pressure decreases. The dynamic pressure is used to measure the airspeed as the airspeed increases with increase in pressure. There are 2 outwardly visible ports on an aircraft related to pitot static system. One is pitot tube that is used to measure the total pressure and one is static port that is used to measure t