Question 19 TK01 - Tank Vessel Assistant - Dangerous Liquids

The Correct Answer is B **Explanation for Option B (Correct):** The problem states that the vessel has "too much trim by the stern" (meaning the draft aft is significantly greater than the draft forward). To reduce trim by the stern, the moment must be shifted forward. Moving weight forward (shifting bunkers forward) creates a trimming moment by the bow. This increases the weight and/or center of gravity (CG) forward of the vessel's center of flotation (CF), effectively reducing the excessive stern trim. **Explanation of Incorrect Options:** * **A) discharge cargo from the after tanks:** Discharging weight from the stern will raise the stern, thus reducing the draft aft. While this does reduce the trim, the vessel is already loaded down to her marks (meaning it is at maximum permissible draft). Removing cargo would reduce the vessel's displacement below the marks, which is generally not the goal when correcting trim if the vessel is supposed to be at maximum load. Furthermore, discharging cargo affects overall stability calculations and operational readiness differently than shifting existing onboard weights like bunkers. The primary operational solution for correcting trim without substantially changing displacement near the limit is shifting internal weights. * **C) add ballast forward:** Since the vessel is already loaded down to her marks (maximum draft/freeboard limit), adding significant ballast is generally impermissible as it would increase the displacement above the allowed limit, sinking the vessel below the legal marks and potentially submerging the deck edge or reducing stability margins. * **D) load more cargo forward:** Similar to adding ballast, loading more cargo forward is generally impossible if the vessel is already loaded "down to her marks." Loading additional cargo would exceed the permissible load/draft limit.