IMO Resolution A167, 1968, Res. No. 749(18) 3.1 (1995, amended 1999), and section 2.2 in the 2008 IS Code, sets the general criterion for vessels of more than 100 meters in length. Your vessel is covered by this regulation. In review of your vessels stability data, after refueling you notice that the GM of the vessel is less than the required 0.15 meters. What should you instruct the 2nd engineer to do with the fuel just received?
Official USCG Answer & Rule Citation
Correct Answer: Option A — Transfer the fuel to lower the ship's KG and minimize the free surface effect.
Maintaining a minimum GM of 0.15 meters is required by the IMO IS Code to ensure adequate stability. Transferring fuel to lower tanks reduces the vertical center of gravity (KG) and minimizes free surface effect, thereby increasing the effective GM to meet regulatory safety standards for intact stability.
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