The COASTAL DRILLER is loaded as shown in...

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Question 1 of 2066636ef128f7522a1c522630

The COASTAL DRILLER is loaded as shown in the Sample Load Form #2 (Preload). What would be the TCG if the preload is dumped and the cantilever and drill floor are skidded aft, placing the rotary 34 feet aft of the transom, and the drill floor is skidded 8 feet to port?

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Question 1 of 20

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🔍 Key Concepts

• How moving a weight athwartships (sideways) affects the transverse center of gravity (TCG) • How moving a weight longitudinally (fore and aft) does or does not affect TCG • Using the moment = weight × distance idea to update centers of gravity after a weight is added, removed, or shifted

💭 Think About

• From the preload condition, which items are being removed and which are being shifted, and how does each action affect the total transverse moment? • Does skidding the cantilever and drill floor aft change TCG, or does it only affect the longitudinal center of gravity (LCG)? Why? • When the drill floor is skidded 8 feet to port, is that movement of weight to port or starboard, and should that make the final TCG positive or negative based on the sign convention of the load form?

✅ Before You Answer

• Check the sign convention on Sample Load Form #2: is port negative and starboard positive, or vice versa? • Confirm whether the preload being dumped had any transverse offset originally (TCG not equal to zero). If it was on centerline, dumping it will not change TCG. • Recalculate the new total transverse moment (sum of all W × TCG) and divide by the new total displacement to get the final TCG, then compare its sign and magnitude with the answer choices.

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