What method helps determine the wind direction during flight?

The course deviation indicator (CDI) is an essential tool for pilots in determining wind direction during flight. This instrument provides visual feedback on an aircraft’s position relative to its intended flight path, which can be influenced by wind. When a pilot is flying a course and observes the readings on the CDI, they can tell if there is a crosswind affecting their trajectory.

If the aircraft is requiring constant correction to maintain the desired course indicated by the CDI, this discrepancy signals the presence of wind. By analyzing how much the needle is deflected from the center position, pilots can infer the direction and, to some extent, the strength of the wind acting on the aircraft.

Understanding wind direction is crucial for navigation, takeoff, landing, and fuel management. The CDI assists pilots in making accurate corrections to their course in response to wind conditions, enhancing flight safety and efficiency.