Because there is a possibility of fuel oil being discharged overboard from a full fuel oil tank, it is decided to transfer 25 kips from tank 14 to tank 13. See COASTAL DRILLER Sample Load Form Number 1 (Rig Move). What would be the change in vertical moments with this transfer?

Correct Answer: Option A — 26 ft-kips decrease

Calculating the change in vertical moments involves multiplying the transferred weight by the vertical distance between tank centers. Using the COASTAL DRILLER stability form, this specific 25-kip transfer results in a net 26 ft-kips decrease in vertical moments.