A semisubmersible, while floating level, displaces 18,000 long tons. Bulk, weighing 400 long tons, is placed in P-tanks located 80 feet to starboard of the centerline. What is the new TCG?

Correct Answer: Option C — 1.74 feet starboard of centerline

Transverse center of gravity (TCG) is determined by taking moments about the centerline: (Total Moment / Total Displacement). Placing 400 long tons 80 feet to starboard on an 18,000 long ton displacement shifts the vessel's TCG to 1.74 feet starboard of the centerline.