Question 4813 Deck General

70% to pass

A semisubmersible displacing 18,000 long tons has an LCG 2 feet forward of amidships. Bulk, weighing 400 long tons, is discharged from P-tanks located 50.8 feet aft of amidships. What is the new LCG?

A 0.8 foot forward of amidships
B 1.20 feet forward of amidships
C 3.11 feet forward of amidships
D 3.20 feet forward of amidships
AI Explanation

The correct answer is D) 3.20 feet forward of amidships. To explain: 1) The question states that the semisubmersible displaces 18,000 long tons and has an LCG 2 feet forward of amidships. When 400 long tons of bulk is discharged from tanks located 50.8 feet aft of amidships, the new LCG will be 3.20 feet forward of amidships. 2) This can be calculated using the formula for determining the new LCG after a weight change, which is: New LCG = (Original LCG * Original Displacement - Weight Moved * Distance Moved) / New Displacement. 3) The other answer choices are incorrect because they do not accurately reflect the new LCG after the weight change. 4) The correct answer, D, is the only option that properly calculates the new LCG based on the given information.

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