33 C.F.R. § 167.1310
In the Strait of Juan de Fuca: General
The traffic separation scheme in the Strait of Juan de Fuca consists of five parts: the western lanes, southern lanes, northern lanes, eastern lanes, and precautionary area “PA.” These parts are described in §§ 167.1311 through 167.1315. The geographic coordinates in §§ 167.1311 through 167.1315 are defined using North American Datum (NAD 83).