Question 4259 Deck General

The correct answer is C) 30 feet. When elevating a COASTAL DRILLER in 200 feet of water, the unit should be placed at an air gap of 30 feet. This is in accordance with the regulations set forth by the US Coast Guard for the safe operation of offshore drilling units. The air gap ensures that there is sufficient clearance between the top of the unit and the water's surface, providing a safety buffer in case of unforeseen events or wave action. The other options, while potentially reasonable in some scenarios, do not align with the specific requirements for a COASTAL DRILLER in 200 feet of water.