In storm conditions, with the wind and waves from the starboard bow of the DEEP DRILLER in 600 feet water depth, the offset is 8%. Completely slacking mooring lines 7 and 8 reduces the offset to __________.
• Mooring line lead and effectiveness when wind and seas are from the starboard bow • How slacking specific lines changes the tension balance and resulting offset • Relationship between environmental forces and restoring forces from remaining lines
• Which mooring lines (by number) are likely on the starboard bow or helping resist motion toward that quadrant? • If you completely slack lines 7 and 8, does the overall restoring force increase, decrease, or just shift direction—and what happens to offset when restoring force changes? • In storm conditions, would taking two lines fully out of the load path usually allow the vessel to move more, less, or the same?
• Identify which side/sector lines 7 and 8 are likely located in relative to the starboard bow environmental loading direction • Consider whether slacking these lines would logically reduce or increase the vessel’s ability to hold position • Check that your chosen percentage offset is consistent with the typical effect of removing mooring restraint in heavy weather, not the opposite.
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