The COASTAL DRILLER is observed to be level...

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Question 1 of 2066636ef128f7522a1c522639

The COASTAL DRILLER is observed to be level at a draft of 10 feet 6 inches. At the same time, the calculated load form shows the displacement to be 13,445 kips, total longitudinal moments 1,613,466 foot-kips, and total transverse moments -10,000 foot-kips. What is the longitudinal location of the missing load?

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Question 1 of 20

66636ef128f7522a1c522639

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🔍 Key Concepts

• Relationship between displacement and total weight (including any missing load) • How total longitudinal moments determine the longitudinal center of gravity (LCG) using LCG = Σ(W·x)/ΣW • Condition for a vessel to be on an even keel: LCG must align with the longitudinal center of buoyancy (LCB) from the hydrostatic data at the observed draft

💭 Think About

• From the observed draft of 10 ft 6 in, what displacement should the ship actually have, and how does that compare with the 13,445 kips from the load form? • Once you know the size of the missing load, how can you combine the given total longitudinal moments and total weight with the missing load’s unknown position x to make the overall LCG match the LCB at that draft? • Write a moment-balance equation about the forward perpendicular (or chosen reference): how should Σ(W·x) change when you add the missing load so that the final LCG ends up at the correct longitudinal location?

✅ Before You Answer

• Be sure you are using the correct total displacement (observed draft’s displacement, not just the 13,445 kips from the incomplete load form). • Confirm you’re computing LCG using LCG = total longitudinal moments ÷ total displacement, with all distances measured from the same reference (AFO). • Before picking an answer, verify that the computed x for the missing load is reasonable relative to the ship’s length and matches one of the given AFO positions.

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