[Code of Federal Regulations] [Title 33, Volume 2] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR167.3] [Page 775] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 167--OFFSHORE TRAFFIC SEPARATION SCHEMES--Table of Contents Subpart A--General Sec. 167.3 Geographic coordinates. Geographic coordinates are defined using North American 1927 Datum (NAD 27) unless indicated otherwise. [CGD 90-039, 59 FR 21937, Apr. 28, 1994]