Question 4437 Deck General

The correct answer is B) 32 feet. When elevating a COASTAL DRILLER in 150 feet of water, the unit should be placed at an air gap of 32 feet. This is in accordance with the regulations set by the US Coast Guard for offshore drilling units. The air gap is the vertical distance between the waterline and the lowest point of the drilling unit's deck to provide adequate clearance and prevent wave impact during operation. The 32-foot air gap ensures the stability and safety of the drilling unit in the given water depth of 150 feet. The other options are incorrect because A) 35 feet would be excessive, C) 30 feet would be too little, and D) 25 feet would not provide the necessary clearance required by the regulations.