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Encyclopedia of Marine and Energy Technology

Submerged turret loading (STL) system


The system of loading of a shuttle tanker directly from the production platform developed by Statoil and the Maritime Consulting Group. Crude is loaded through a riser extending from a subsea line from the platform. The riser is connected to a submerged buoy, moored to the seabed by eight anchor lines. This is lifted into a conical recess under the bow and hydraulically locked in place. The buoy is located by a hydroacoustic transponder and by TV cameras during the final approach.

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