Your semisubmersible drilling unit is moving...

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Question 1 of 2066636ee728f7522a1c51888a

Your semisubmersible drilling unit is moving onto a location in shallow water with a very hard bottom. What is the most effective means of maintaining your position at this location during severe weather?

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Question 1 of 20

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🔍 Key Concepts

• Anchor holding power in very hard bottoms (how fluke angle affects penetration and holding) • Behavior of LWT (Lightweight) anchors with and without fluke angle blocks • Effect of anchor line length and configuration (scope, catenary, piggybacking) in severe weather

💭 Think About

• In very hard seabeds, is increased fluke penetration or reduced penetration usually better for holding a semisubmersible in place? • How do fluke angle blocks change the angle at which the anchor flukes meet the seabed, and what does that do to holding power in hard ground? • In severe weather, what matters more for a semisubmersible: simply having more chain in the water, or optimizing how the anchors engage with the specific bottom type?

✅ Before You Answer

• Identify what LWT anchors are designed for and how fluke angle blocks modify their behavior • Consider how a very hard bottom limits anchor penetration compared to mud or sand, and what adjustment improves bite/holding • Think about which option directly improves anchor–bottom interaction for this bottom type, rather than just adding more weight or tension

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