A boat begins to gybe at the moment when, with the wind aft, the foot of her mainsail crosses her centre line and completes the gybe when the mainsail has filled on the other side.
Isikhephe siqalisa ukuba phambi komoya emzuzwini xa, ngomoya emva, ngonyawo loqhutyo olungundoqo lunqumla kumgca wombindi lugqibezele ukubaleka phambi komoya xa uqhutyo olungundoqo lufakwe kwelinye icala.