Code of Federal Regulations Title 46. Shipping § 46.7.20 Nantucket Sound, Vineyard Sound, Buzzards Bay, Narragansett Bay, MA, Block Island Sound and easterly entrance to Long Island Sound, NY

(a) A line drawn from Chatham Light to latitude 41°36.1′ N. longitude 69°51.1′ W. (Pollack Rip Entrance Lighted Horn Buoy “PR”);  thence to latitude 41°26.0′ N. longitude 69°46.2′ W. (Great Round Shoal Channel Lighted Buoy “2”);  thence to Sankaty Head Light.

(b) A line drawn from the westernmost extremity of Nantucket Island to the southwesternmost extremity of Wasque Point, Chappaquiddick Island.

(c) A line drawn from Gay Head Light to Block Island Southeast Light;  thence to Montauk Point Light on the easterly end of Long Island.