Question 5002 Deck General

70% to pass

A jack-up 180 feet in length with the LCF at 120 feet AFO has a true mean draft (draft at LCF) of 10 feet. If the trim is 3 feet by the stern, what is the draft at the stern?

A 8.0 feet
B 9.0 feet
C 11.0 feet
D 12.0 feet
AI Explanation

The correct answer is C) 11.0 feet. To explain, the draft at the stern can be calculated using the given information about the length, longitudinal center of flotation (LCF), true mean draft, and trim. The formula is: Draft at stern = True mean draft + (Trim / Length) * (Length - LCF). Plugging in the values, we get: Draft at stern = 10 feet + (3 feet / 180 feet) * (180 feet - 120 feet) = 11.0 feet. The other options are incorrect because they do not correctly apply the formula to calculate the draft at the stern given the provided information.

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