crab

Definition of “Crab” in Aviation

Crab is a flight maneuver utilized by pilots to counteract the drift of an aircraft caused by a crosswind. This technique involves offsetting the aircraft’s heading from the desired track by a precise amount. The pilot calculates the required offset, factoring in the direction and intensity of the crosswind, and adjusts the heading accordingly.

When the aircraft is crabbing, its true heading differs from its track over the ground. However, the aircraft is aligned with the direction of the wind and track on which it was taking off or landing. This arrangement means that the aircraft’s velocity, combined with the wind through vector addition, will result in a net movement in the desired direction.

Crabbing helps maintain the aircraft’s stability and safety during takeoff and landing in crosswind conditions. It enables the pilot to prevent the aircraft from drifting off-course, maintain the correct angle of attack, and improve overall control. The crab maneuver is essential for pilots, particularly those operating in regions with high winds, to ensure safe and efficient flight operations.