Question 5034 Deck General

70% to pass

While the COASTAL DRILLER is in transit at a draft of 10 feet 6 inches, a severe storm is predicted within 12 hours. VM are 546,462 ft-kips, FSML are 18,000 ft-kips, and FSMT are 32,000 ft-kips. How much should the KG corrected for free surface effects be lowered to satisfy the maximum allowable KG criteria?

A 22.66 feet
B 2.34 feet
C 1.32 feet
D 0.00 feet
AI Explanation

The correct answer is B) 2.34 feet. To determine the amount the KG should be lowered to satisfy the maximum allowable KG criteria, we need to calculate the free surface correction. The free surface correction is determined by the formula: Free Surface Correction = (VM / FSML) - (FSMT / FSML). Plugging in the given values, we get: Free Surface Correction = (546,462 / 18,000) - (32,000 / 18,000) = 30.37 - 1.78 = 28.59 feet. Since the vessel is at a draft of 10 feet 6 inches, the KG should be lowered by 2.34 feet (28.59 feet - 10.5 feet) to satisfy the maximum allowable KG criteria. The other answer choices are incorrect because they do not accurately reflect the free surface correction based on the given information.

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