59. The liquid mud tanks on your vessel measure 18'L by 10'B by 6'D. The vessel's displacement is 944 T and the specific gravity of the mud is 1.9. What is the reduction in GM due to a pair of these tanks (p/s) being slack?

The reduction in GM is calculated by determining the combined transverse second moments of area for two slack tanks, multiplying by the liquid density, and dividing by the ship's displacement. This results in a GM reduction of approximately 0.17 feet, which is closest to the provided answer of 0.16 feet.