Results of a Survey of Offshore Supply Vessel Builders and Operators Concerning the Use of Passive Anti-Roll Tanks and Recommendations for the T-AGOS.
GIANNOTTI AND BUCK ASSOCIATES INC RIVERDALE MD
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A recent seakeeping study conducted for the T-AGOS hard chine hull presented results of analytical roll predictions for the T-AGOS with and without anti-roll devices. Two such devices were considered paravanes flopper stopper and passive anti-roll tanks. Previous experience with paravanes has been mainly restricted to fishing vessels and a few oceanographic research ships such as the RV CAPE HENLOPEN of the University of Delaware and the SCORPIUS. Full scale tests have been conducted on the CAPE HENLOPEN to determine the effectiveness of these devices in reducing roll but the results of these tests are not available at the present time. Furthermore the installation of paravanes on a larger vessel, the MOANA WAVE length 158.36 ft, displacement 950 tons is presently under consideration. Pending the analysis results of the CAPE HENLOPEN tests with paravanes installed it was decided to conduct a study to investigate the experience with passive anti-roll tanks in offshore supply vessel hulls similar to that of the T-AGOS.
- Marine Engineering