nurk laeva pööramise telje ja pöördetee puutuja vahel, horisontaalne nurk lennuki pikitelje ja selle teekonna vahel maapinna suhtes, ehk nurk kursi ja sihtraja vahel, angle between the axis of a ship when turning and the tangent to the path on which it is turning, horizontal angle between the longitudinal axis of an airplane and its path relative to the ground : the angle between the heading and the track