Full-scale trial to measure the bollard performance of a tugboat, the change in performance as the tug assists a tanker at low speed, and the response of the tanker to tug forces, were conducted in the Southern Chesapeake Bay. The tugboat EXXON GARDEN STATE, with twin Kort-nozzle propellers, two steering rudders, and four flanking rudders, and the T-5 tanker USNS AMERICAN EXPLORER, were used for these trials. This report describes the test program, vessels, and equipment and presents test results as a series of graphs and tables. Results include the definition of tugboat bollard performance as a function of propeller rpm and rudder angle, the description of changes to this performance as the tug operates to assist the tanker (both stationary and moving), and track and heading plots for the tanker while it is experiencing tug forces. In addition, the tanker maneuvering characteristics (without tug assistance) are defined through four standard maneuver tests. Finally, a number of the tugboat performance characteristics are presented in non-dimensional format.


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    Title :

    Full-Scale Trials to Examine Tugboat Performance During Berthing of Tankers


    Publication date :

    1982


    Size :

    283 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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