[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: 33CFR150.309] [Page 222-223] 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. 150.309 Advisories to tankers. (a) The Vessel Traffic Supervisor shall advise the master of each tanker underway in the safety zone of the tanker's position by range and bearing from the PPC at intervals not to exceed 10 minutes. (b) Whenever the Vessel Traffic Supervisor determines that a vessel may potentially interfere with the movement of a tanker in the safety zone, the Vessel Traffic Supervisor shall keep the master of the tanker informed of the position and estimated course [[Page 223]] and speed of the vessel as necessary to assist the tanker in navigation within the safety zone. (c) Whenever a tanker enters the safety zone, the Vessel Traffic Supervisor shall advise the tanker of the position of each other vessel moored, anchored, or underway in the safety zone.