(a) A line drawn from the northeasternmost extremity of Point Mansfield, Sitklan Island 040 true to the mainland.
(b) A line drawn from the southeasternmost extremity of Island Point, Sitklan Island to the southernmost extremity of Garnet Point, Kanagunut Island; thence to Lord Rock Light; thence to Barren Island Light; thence to Cape Chacon Light; thence to Cape Muzon Light.
(c) A line drawn from Point Cornwallis Light to Cape Bartolome Light; thence to Cape Edgecumbe Light; thence to the westernmost extremity of Cape Cross.
(d) A line drawn from Surge Bay Entrance Light to Cape Spencer Light.