All of the Maryland waters of the Potomac River, downstream of the Woodrow Wilson (I-95) Bridge, south of a line beginning at a point on the north side of the Woodrow Wilson (I-95) Bridge, at or near Lat. 38° 47.600' N., Long. 77° 2.263' W., then running 88° (True) to a point, at or near Lat. 38° 47.617' N., Long. 77°1.532' W., and upstream of a line beginning at the Maryland-District of Columbia Line Pile “DC1A”, at or near Lat. 38° 47.480' N.,, Long. 77° 2.360' W., then running 89° (True) to a point on the Maryland shore, at or near Lat. 38° 47.495' N., Long. 77°1.448' W. This area has a 6-knot speed limit all year.