When assuming the maximum ice weight accumulation on the DEEP DRILLER at survival draft, the vertical moments are increased by __________.

Correct Answer: Option C — 45,593 ft-long tons

Ice accumulation allowances on mobile offshore drilling units are mandated by stability criteria to account for topside icing. For the DEEP DRILLER at survival draft, maximum ice loading increases vertical moments by 45,593 ft-long tons, significantly raising the effective vertical center of gravity.