The liquid mud tanks on your vessel measure 20'L by 18'B by 7'D. The vessel's displacement is 866 T and the specific gravity of the mud is 1.8. What is the reduction in GM due to a pair of these tanks (p/s) being slack?

Correct Answer: Option D — 1.12 feet

Transverse stability loss from slack liquid mud tanks is quantified by dividing the aggregate free surface moments by vessel displacement (866 T). Utilizing tank dimensions (20' × 18' × 7') and 1.8 specific gravity, the resulting free surface correction equates to a 1.12-foot reduction in GM.