Your tank vessel is fully loaded to the marks, and you find that she is down slightly by the head. Which of the following choices would be the best action to take to trim the vessel slightly by the stern?
• Trim by the stern vs trim by the head – what it means and which way weight must move • Effect of adding weight vs shifting existing weight on a vessel that is already loaded to marks • Difference between cargo and ballast changes on draft and loading limits
• First, picture a simple seesaw: what happens to each end when you move weight toward one end versus when you add extra weight to one end? Relate that to bow (forward) and stern (aft). • Ask yourself: since the vessel is already loaded to the marks, what limitations does that put on adding any more weight? • Compare each choice: which actions increase total displacement, and which only redistribute existing weight? Which is usually preferred when you’re already at your load line?
• Verify which options add new weight to the vessel and which only shift weight already on board. • Check how each option would affect the overall draft relative to the load line marks, not just trim. • Confirm which option will put more effective weight aft to bring the bow up, without violating loading limits.
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