33 C.F.R. § 167.1300
In the approaches to the Strait of Juan de Fuca: General
The traffic separation scheme for the approaches to the Strait of Juan de Fuca consists of three parts: the western approach, the southwestern approach, and precautionary area “JF.” These parts are described in §§ 167.1301 through 167.1303. The geographic coordinates in §§ 167.1301 through 167.1303 are defined using North American Datum (NAD 83).