AREA OF PLATFORMS OF PETROLEUM 1.- In the area showed of this ENC, there are numerous platforms of petroleum that normally have ilumination, others only are submerged obstructions, sometimes marked with buoys. 2.- As measure of security is prohibited to approach a minor distance 500 meters of the platforms of Petroleum. PRECAUTION 1.- All the ships must be far away to 2.5 miles out of the surroundings of Punta Lobos.