OIL AND GAS FIELDS

Production platforms and associated structures, including
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. Other uncharted structures, both
lit and unlit and submerged installations, some marked by
buoys, may exist. For further information see The Mariner's
Handbook.