CROSSING TRAFFIC Mariners leaving the north-east going lane and planning to cross the south-west going lane, between the Varne (51°01'·3N 1°23'·9E) and F1 (51°11'·2N 1°45'·0E) light-buoys should be aware of heavy traffic in the south-west going lane, as well as ferry traffic, and alter course and/or speed at an appropriate point. For further details, see Admiralty Sailing Directions.