The SS AMERICAN MARINER has the liquid load shown in table ST-0100 below. Use the white pages of The Stability Data Reference Book to determine the LCG-FP of the liquid load.
• Use the white pages for SS AMERICAN MARINER to find each tank’s LCG from FP and the corresponding weight of liquid in that tank • Apply the moment formula: Total Longitudinal Moment = Σ(weight × LCG), then find overall LCG = Total Moment ÷ Total Weight • Be careful with port/starboard pairs and centerline tanks – verify if they share the same LCG and how their weights combine
• For each tank listed in the table (DB 4 CL, DB 4 P, DB 4 S, etc.), what two pieces of information do you need to pull from the Stability Data Reference Book to compute its contribution to the liquid load’s LCG? • Once you have all individual tank moments, how do you combine them to get a single LCG for the entire liquid load relative to the forward perpendicular (FP)? • How can you quickly rule out any answer choices that are clearly too far forward or aft based on where most of these tanks are located along the ship’s length?
• Confirm you are using the correct ship (SS AMERICAN MARINER) and the correct table (liquid load / tank capacities) in the white pages • Verify that you summed all the weights for every tank shown in ST-0100 and no tank is omitted or double-counted • After computing LCG, check that the value is reasonable compared to the individual LCGs of the forward-most and aft-most tanks in your list
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