What is the change in longitudinal moments for the DEEP DRILLER if 103.48 long-tons of ballast is transferred from a full ballast tank 1P to an empty ballast tank 10S?

Correct Answer: Option A — 21,913 foot-tons decrease

Longitudinal moment change equals transferred weight multiplied by the distance between tank centers. Transferring 103.48 long-tons from tank 1P to 10S uses the longitudinal arm from the DEEP DRILLER capacity tables, producing a 21,913 foot-tons decrease in total longitudinal moments.