55. 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?

The reduction in GM due to two slack mud tanks is calculated using the free-surface correction formula, which considers the tanks' dimensions, specific gravity, and the vessel's displacement volume. The calculation yields a reduction of approximately 1.12 feet.