MULTILEG TANKER MOORING SYSTEM.
PITTSBURGH UNIV WASHINGTON DC RESEARCH STAFF
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This Technical Information Report describes the multileg tanker mooring system five to eight legs, which is a segment of a comprehensive fuel-handling equipment development program. The system is intended for mooring tankers of up to 40,000-DWT capacity in sheltered waters and those of up to 22,500-DWT capacity under open sea conditions. It is installable in 72 hours. Each leg of the system consists of a mooring buoy, an explosive embedment anchor, riser mooring cables, and ancillary equipment. At each presurveyed mooring point an explosive embedment anchor is lowered from an A-frame mounted on a pipeline-pulling barge into the sea until its 4-foot standoff probe strikes the ocean bottom. The impact of the probe on the bottom actuates an electric fuze, which initiates a Pyrocore igniter cord. This ignites the propellant, and the anchor is embedded in any type of sea bottom except consolidated rock. Under ideal conditions one leg can be installed in 30 minutes, but 72 hours will be required to complete a fully operational installation. During engineering design tests the anchors have held up to 282,000 pounds. The new system will replace the USN Class C 4-leg mooring system contained in the functional component set. Engineering-service tests are to be completed about mid-1967. Author
- Marine Engineering