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Operability Index – Side Door
For the lower speed range (0 to 6 knots) where vehicle launch, recovery, and support will most likely take place, the operability index is higher than 50% even for sea state 4.
Based on the polar graphs we produced, we can evaluate the ship’s heading and speed so that operations can be maintained.
Based on the results of the seakeeping studies, we decided to fix the vertical location of both aft and side ramps at 2 meters above the calm waterline.