Question 2211 Deck Safety

70% to pass

The change in trim of a vessel may be found by _______________.

A dividing the trim moments by MT1
B dividing longitudinal moments by the displacement
C subtracting the LCF from the LCB
D looking at the Hydrostatic Properties Table for the draft of the vessel
AI Explanation

The correct answer is A) dividing the trim moments by MT1. The change in trim of a vessel is determined by the trim moments, which are the moments that act to change the vessel's trim. These trim moments are divided by the longitudinal moment to change trim 1 inch (MT1) to calculate the change in trim. MT1 is a value found in the vessel's hydrostatic tables, which represent the moment required to change the vessel's trim by 1 inch. Dividing the trim moments by MT1 provides the change in trim in inches. The other options are incorrect because they do not directly relate to the calculation of change in trim. Option B uses longitudinal moments and displacement, option C subtracts the longitudinal center of flotation (LCF) from the longitudinal center of buoyancy (LCB), and option D refers to the hydrostatic properties table, but none of these directly determine the change in trim.

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Official Resources
46 CFR Lifesaving Equipment USCG Marine Safety Center USCG National Maritime Center
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