Question 11 TK02 - Tank Vessel Assistant - Liquefied Gas

The Correct Answer is D **Explanation of why option D is correct:** List refers to the transverse (sideways) tilt of the vessel. To correct a list efficiently, weight must be adjusted far from the ship's centerline (transversely). Wing tanks provide the greatest leverage for controlling list because they are located along the sides of the hull. Furthermore, adjusting weight near the vessel's longitudinal center of gravity (midships) minimizes the creation of unwanted trimming moments (fore and aft changes). Therefore, discharging cargo from a high wing tank on the high side (or loading the low-side wing tank, though discharging is preferred during discharge operations) near the midships section is the primary and most effective method used by tanker officers to correct and maintain transverse stability. **Explanation of why the other options are incorrect:** **A) by using the after peak tank, loading as necessary:** The after peak tank is located far aft and its primary function is controlling the vessel's trim (fore and aft balance). While it can slightly affect list, using it introduces significant trimming moments and is not the standard or preferred method for transverse stability control. **B) by shoreside personnel:** List control is the direct responsibility of the vessel’s crew (specifically the Chief Officer or duty officer). Shoreside personnel manage terminal operations, but they do not operate the ship’s ballast or cargo tank valves required to correct internal stability issues. **C) by using a center tank near the bow, discharging as necessary:** Center tanks are located on the ship’s centerline and offer very little leverage to correct transverse list. Additionally, using a tank far forward (near the bow) would create a large trimming moment, significantly affecting the draft forward, which is undesirable for simple list correction.