The COASTAL DRILLER, while operating with...

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Question 1 of 2066636ee728f7522a1c517749

The COASTAL DRILLER, while operating with minimal wave clearance, is inclined 0.5 degrees bow down. Lowering the stern may place the hull in the wave action. The recommended course of action is to __________.

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🔍 Key Concepts

• Minimal wave clearance on a jack-up unit and why hull immersion in wave action is dangerous • How trim (bow down vs stern down) can be corrected: by leg jacking vs weight transfer • Operational limits and why you normally avoid increasing loading on the more critical/low-clearance end

💭 Think About

• If the hull is already close to the waves, what is the effect of lowering any part of the hull further toward the sea surface? • Which actions would tend to reduce a bow-down trim and increase clearance, and which would make the situation worse or do almost nothing? • In normal jack-up practice, when operating with minimal air gap, what type of corrections are preferred: structural repositioning of legs or internal ballasting/weight shifts?

✅ Before You Answer

• Identify which choices would further reduce wave clearance at either end of the hull and eliminate those. • Check which option directly corrects the bow-down trim without lowering the stern into the waves. • Consider standard safety practice: avoid actions that increase hull exposure to wave impact when already at minimal wave clearance.

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