What is the change in transverse moments for the Coastal Driller if 2.5 feet of drill water is discharged from drill water tank 23?

Correct Answer: Option A — 1,671 ft-kips

Transverse moment changes equal the weight of discharged drill water multiplied by the transverse distance from the vessel's centerline to the tank's center of gravity. For tank 23, discharging 2.5 feet generates a transverse moment change of 1,671 ft-kips based on vessel capacity tables.