The rotary of the COASTAL DRILLER is located...

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Question 1 of 2066636ee728f7522a1c5187f3

The rotary of the COASTAL DRILLER is located 38 feet aft of transom and 6 feet to starboard of the centerline. With the changes to lightweight shown in the Operating Manual, the maximum allowable hook load is __________.

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🔍 Key Concepts

• Hook load vs. rotary position and how off-center loads affect allowable limits • Using the Operating Manual tables/graphs that relate lightweight changes to maximum hook load • Effect of transom reference points (aft of transom, off centerline) on structural and stability limits

💭 Think About

• How does moving the rotary away from the centerline and aft from the transom affect the moment that the hook load creates? • When you apply the lightweight changes from the Operating Manual, do they increase or decrease the reserve capacity for hook load at that specific rotary location? • Which choice best matches the reduced allowable hook load after accounting for both the offset location and the updated lightweight?

✅ Before You Answer

• Locate the correct table or curve in the COASTAL DRILLER Operating Manual that gives maximum hook load for a rotary 38 ft aft of the transom and 6 ft to starboard. • Apply the lightweight correction exactly as described in the manual (watch units: long tons, kips, feet). • Confirm that the final value does not exceed the original structural or stability limit for that rotary position before lightweight changes.

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