Wind measurement system is a passive, aerodynamic yaw system with an operating mode, which uses the electrical power generated as an indicator of wind speed. Sequence control and yawing requires measuring the wind speed and direction, in case of larger turbines. It is better to measure wind speed directly by means of the electric power output. The rotor is the wind measuring instrument of a turbine. The precise measurement of wind speed and direction is an essential element in weapon and decoy systems control, helicopter and fixed wing aircraft handling, navigation and fuel management. In addition to supplying basic meteorological information, vectored wind velocity measurements are essential to the analysis of small caliber ballistic trajectories, optical wave propagation in the lower atmosphere, and wind shears as well as vorticies.