Before revision: Directional stability can affect yaw stability, which affects course-keeping, particularly in bow and quartering seas, and in overtaking seas, when flow velocity past the rudder may drop significantly, or become negative, while bow immersion may simultaneously increase, moving the centre of lateral area forward.
After revision: Directional stability , or yaw stability, which affects course-keeping, particularly in bow and quartering seas, and in overtaking seas, when flow velocity past the rudder may drop significantly, or become negative, while bow immersion may simultaneously increase, moving the centre of lateral area forward.