Question 4579 Deck General

The correct answer is A) trim by the stern. When a semisubmersible rig under tow veers from side to side, trimming by the stern helps to stabilize the rig and keep it on course. Trimming by the stern lowers the bow and raises the stern, which counteracts the side-to-side motion and helps the rig track straight behind the towing vessel. The other options are not as effective. Trimming by the bow (B) would have the opposite effect and destabilize the rig. Playing out stern anchor chain (C) would not provide the necessary directional control. Adjusting the towing bridle length (D) may help, but trimming by the stern is generally considered the most effective way to control the side-to-side motion of a semisubmersible rig under tow.