Question 2086 Deck Safety

70% to pass

The correction to KG for longitudinal free surface effects for a vessel can be found by dividing the vessel's displacement into the _______________.

A transverse free surface correction for the vessel
B sum of the longitudinal free surface moments of the vessel
C longitudinal centerline of the vessel
D sum of the vertical moments of the vessel
AI Explanation

The correct answer is B) the sum of the longitudinal free surface moments of the vessel. The correction to KG (vertical center of gravity) for longitudinal free surface effects is calculated by dividing the vessel's displacement into the sum of the longitudinal free surface moments of the vessel. This is the standard method prescribed by maritime regulations and stability guidelines for determining the impact of longitudinal free surface on a vessel's stability characteristics. The other options are incorrect because: A) the transverse free surface correction is a separate calculation, C) the longitudinal centerline is not directly used in the longitudinal free surface correction, and D) the sum of the vertical moments is not the appropriate parameter for this calculation.

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