PRODUCTION PLATFORMS
Production Platforms and associated structures exhibit white lights Mo(U)15M and red air obstruction lights, and sound fog horns Mo(U)30s.  SAFETY ZONES have been established for the protection of the production facilities and the marine environment.  Unauthorized navigation within the Safety Zone is prohibited.  Any ship proposing to transit the Safety Zone must contact the operator on VHF Channel 16 and, if approved, comply with the instructions given while transiting the area.  Ship movement in the area is monitored on a 24-hour basis.  For additional information, consult Notice No. 20 in the Notices to Mariners, Annual Edition.