A semisubmersible which flops between forward and aft trim angles is likely to have __________.

Correct Answer: Option D — KML less than KGL

Longitudinal metacentric height (KML) less than longitudinal center of gravity height (KGL) results in negative longitudinal initial stability. Similar to transverse loll, the semisubmersible experiences longitudinal instability, causing it to flop or oscillate between forward and aft trim angles rather than settling upright.