Maneuvering trials of the 278,000 deadweight ton tanker ESSO OSAKA were made in two shallow water and one deep water sites in the Gulf of Mexico in July and August 1977 as a cooperative effort of the U.S. Government and tanker operators through the American Institute of Merchant Shipping. Objectives included developing information for improving the quality of simulations of maneuvering behavior, for obtaining a better understanding of scale effects, for developing deepwater port safety zones, and on which to base shiphandling maneuvering information. The trials addressed the effects of water depth, ship speed and propeller rpm on turning circles, Z-Maneuvers, stopping, coasting turns, coasting Z-Maneuvers, and accelerating turns. Water current measurements aided correction of the results to a zero current condition. In general, it was found that the ESSO OSAKA as presently constructed could maneuver reliably and predictably under all conditions tested. Beyond the more operational maneuvers, special trials including spiral tests were conducted to provide input data for systems identification research.


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    Title :

    Maneuvering Trials of the 278,000 DWT ESSO OSAKA in Shallow and Deep Waters


    Contributors:
    C. L. Crane (author)

    Publication date :

    1979


    Size :

    180 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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