33 C.F.R. § 167.101
In the approaches to Narragansett Bay, RI, and Buzzards Bay, MA: Precautionary areas
(a) A precautionary area is established with a radius of 5.4 miles and is centered upon geographical position 41°06.00′ N, 71°23.30′ W.
(b) A precautionary area is established with a radius of 3.55 miles and is centered upon geographical position 41°25.60′ N, 71°23.30′ W.