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. Within Abu Dhabi waters, mariners are strongly advised to contact the Critical Infrastructure and Coastal Protection (CICPA) at Abu Dhabi, in advance, to obtain the necessary permissions to enter the restricted areas. Telephone +9712 6550900, FAX +9712 6550919.