While being towed at a 19.5 foot draft, the DEEP DRILLER experiences single amplitude rolls of 10° with a period of 8 seconds. You should __________.

Correct Answer: Option A — ballast the rig to a 45 foot draft and check the vessel motions

Excessive roll amplitudes at shallow drafts threaten stability and deck cargo security. Ballasting the rig down to a 45-foot draft increases transverse metacentric height and dampens roll motion by submerging hull forms deeper into stable water layers.