The COASTAL DRILLER is loaded as shown in...

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Question 1 of 2066636ee728f7522a1c517735

The COASTAL DRILLER is loaded as shown in the Sample Load Form Number 1 (Rig Move). If the contents of 6 and 7 drill water tanks are discharged, what would be the new height of the transverse metacenter?

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Question 1 of 20

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🔍 Key Concepts

• Transverse metacentric height (GMt) and how it relates to KB, KG, and BM • Effect on KM (height of metacenter above keel) when weights are removed low in the vessel and off the centerline • How removing weight from specific tanks changes the vessel’s displacement and the moment of inertia of the waterplane

💭 Think About

• Look at where tanks 6 and 7 are located vertically and transversely. Are they low or high in the vessel? On or off the centerline? How does that affect KM? • When you discharge these tanks, what happens to displacement (Δ) and to the waterplane’s second moment of area (I)? In the formula for BM, which way will BM change? • Use the original KM (or GM) from the sample load form. Then carefully recompute KM after discharge using the hydrostatic data: how does the change in draft and displacement alter KM?

✅ Before You Answer

• Confirm from the load form what the initial KMt (or GMt and KG) is before discharging the tanks. • Verify the vertical centers (KG of the tanks) and their transverse positions so you can calculate the change in KG correctly. • After calculating the new KMt, double-check that the direction of change makes physical sense: removing low weight will generally tend to raise KG and adjust KM—does your final KMt reflect this combined effect?

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