OIL AND GAS FIELDS
Production platforms and associated structures, including tanker moorings, storage tankers and platforms on pipelines, 
generally exhibit Mo(U) lights, aircraft obstruction lights, and audible fog signals. 
Unauthorised navigation is prohibited within 500 metres of all such structures,
including storage tankers which can swing about their moorings. Tankers maneuvering in the vicinity of platforms and moorings should be given a wide berth.