Drift Angle-Ground Speed Indicator

The Drift Angle-Ground Speed Indicator (DAGSI) is an instrument used in aviation to measure the drift angle and ground speed of an aircraft. The drift angle refers to the angle between the aircraft's heading and the direction in which it is actually moving due to wind. The ground speed is the speed at which the aircraft is moving relative to the ground.

The DAGSI combines inputs from the aircraft's heading indicator and airspeed indicator to calculate the drift angle and ground speed. It takes into account the wind speed and direction to determine the aircraft's actual movement over the ground.

The drift angle is important for pilots to accurately navigate and maintain their desired track. By knowing the drift angle, pilots can make adjustments to their heading to compensate for the effect of wind and maintain their intended course.

The ground speed is also crucial for flight planning and navigation. It helps pilots estimate the time of arrival at a destination, calculate fuel consumption, and make decisions regarding flight routes and altitudes.

Overall, the Drift Angle-Ground Speed Indicator is a valuable instrument for pilots to accurately determine their aircraft's drift angle and ground speed, allowing for more precise navigation and flight planning.