The Magothy River entrance channel encompasses the area enclosed by a line beginning at a point, at or near Lat. 39° 3.360' N., Long. 76° 25.782' W., then running 203° (True) to a point, at or near Lat. 39° 3.268' N., Long. 76° 25.832' W., then running 293° (True) to a point, at or near Lat. 39° 3.382' N., Long. 76° 26.170' W., then running 23° (True) to a point, at or near Lat. 39° 3.473' N., Long. 76° 26.120' W., then running 113° (True) to the point of beginning. This area has a 6-knot speed limit, during the boating season. This area is approximately 600 feet wide and 1,874 feet long.