The traffic separation scheme in Puget Sound and its approaches consists of three parts: Rosario Strait, approaches to Puget Sound other than Rosario Strait, and Puget Sound. These parts are described in Secs. 167.1321 through 167.1323. The North American Datum (NAD 83) defines the geographic coordinates in Secs. 167.1321 through 167.1323. [USCG-2002-12702, 75 FR 70827, Nov. 19, 2010]