OIL AND GAS FIELDS

Within the area charted by larger scale data, certain fixed structures, pipelines and cables
have been omitted due to their complexity and frequent change. The appropriate larger
scale datasets should be used in this areas. 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. Additionally, and in accordnance with
Saudi Ports Authority Notice to Mariners, the majority of oil and gas field features have
been omitted from this dataset within the Saudi Arabian oilfields.