(a) A line drawn from the seaward extremity of the Coos Bay South Jetty to latitude 43°21.9′ N. longitude 124°21.7′ W. (Coos Bay Entrance Lighted Bell Buoy “1”); thence to the seaward extremity of the Coos Bay North Jetty.

(b) A line drawn from the lookout tower located in approximate position latitude 46°13.6′ N. longitude 124°00.7′ W. to latitude 46°12.8′ N. longitude 124°08.0′ W. (Columbia River Entrance Lighted Whistle Buoy “2”); thence to latitude 46°14.5′ N. longitude 124°09.5′ W. (Columbia River Entrance Lighted Bell Buoy “1”); thence to North Head Light.

(c) A line drawn from latitude 46°52.8′ N. longitude 124°12.6′ W. (Grays Harbor Light to Grays Harbor Entrance Lighted Whistle Buoy “2”); thence to latitude 46°55.0′ N. longitude 124°14.7′ W. (Grays Harbor Entrance Lighted Whistle Buoy “3”); thence to Grays Harbor Bar Range Rear Light.