A semisubmersible, while floating level, displaces 20,000 long tons. LCB is 3.0 feet forward of amidships. Bulk, weighing 300 long tons, is placed in P-tanks located 40 feet aft of amidships. What is the new LCG?

Correct Answer: Option C — 2.36 feet forward of amidships

Longitudinal center of gravity shift is determined by taking moments about amidships. Initial moment is 20,000 tons times 3.0 ft forward (+60,000 ft-tons). Adding 300 tons at 40 ft aft (-12,000 ft-tons) yields +48,000 ft-tons. Dividing by final displacement (20,300 tons) gives 2.36 feet forward of amidships.