The traffic separation scheme in the approaches to Narragansett Bay, RI, and Buzzards Bay, MA, consists of four parts: Two precautionary areas and two approaches—a Narragansett approach and a Buzzards Bay approach. The specific areas in the approaches to Narragansett Bay, RI, and Buzzards Bay, MA, are described in §§ 167.101 through 167.103. The geographic coordinates in §§ 167.101 through 167.103 are defined using North American Datum 1983 (NAD 83), which is equivalent to WGS 1984 datum.