Lowering the hull of the COASTAL DRILLER and refloating should be done in favorable weather conditions with wave heights not more than __________.
• Manufacturer/owner operating limitations for the COASTAL DRILLER hull operations • Effect of wave height on stability and control when lowering/refloating a mobile offshore unit • Difference between "can physically be done" and what is permitted in the procedures
• Which of these wave heights would give the calmest, most controllable conditions for a delicate evolution like lowering and refloating the hull? • For a specific named unit like COASTAL DRILLER, are the limits usually conservative or near the edge of what the unit can tolerate? • If the sea state worsened slightly beyond the chosen limit, which of these values would still leave some safety margin rather than already being borderline?
• Check what the COASTAL DRILLER operating manual (or similar exam reference) specifies as the maximum significant wave height for lowering/refloating the hull. • Verify that you are picking the most conservative wave height that is still realistic for offshore operations, not the largest number that "sounds okay". • Confirm that the value you choose is consistent with the idea that this evolution should be done in favorable weather conditions, not just "tolerable" conditions.
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