A motion-compensated launch/recovery crane |
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| Authors: | EH Kidera |
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| Institution: | Ocean Engineering, U.S. Naval Academy, Annapolis, MD 21402, U.S.A. |
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| Abstract: | Oceanographic instrumentation towed from a surface platform is normally subjected to unwanted vertical motion imparted by the rolling, heaving, and pitching of the platform. This motion can cause severe shock-loading conditions in the tow cable and induces unplanned depth variations that reduce the instruments' resolution. This article discusses a unique motion-compensation system for use with towed instrumentation that eliminates shock loading and minimizes depth variation. The system is operational in sea states as high as 5 and effectively decouples 96% of the vessel's motion. |
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