[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: 33CFR150.303] [Page 222] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 150--OPERATIONS--Table of Contents Subpart C--Vessel Navigation Sec. 150.303 Definitions. Support vessel means a tug, linehandling boat, crewboat, workboat, supply vessel, bunkering vessel, barge, or other similar vessel working for a licensee in connection with the operation of a deepwater port or cleared by a licensee to service a tanker calling at a deepwater port. Tanker means a vessel that calls at a deepwater port to load or unload oil at a SPM.