Code of Federal Regulations Title 33. Navigation and Navigable Waters § 33.80.115 Portland Head, ME to Cape Ann, MA

(a) Except inside lines specifically described in this section, the 72 COLREGS shall apply on the harbors, bays, and inlets on the east coast of Maine, New Hampshire, and Massachusetts from Portland Head to Halibut Point at Cape Ann.

(b) A line drawn from the southernmost tower on Gerrish Island charted in approximate position latitude 43°04.0′ N., longitude 70°41.2′ W. to Whaleback Light;  thence to Jaffrey Point Light 2A;  thence to the northeasternmost extremity of Frost Point.

(c) A line drawn from the northernmost extremity of Farm Point to Annisquam Harbor Light.