While anchored in 600 feet water depth,...

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Question 1 of 2066636ee728f7522a1c5174c2

While anchored in 600 feet water depth, 3,150 feet of chain is deployed for line #8. Tension on that line is 220 kips. According to the DEEP DRILLER Operating manual, how much of that chain lies along the bottom?

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Question 1 of 20

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🔍 Key Concepts

• Catenary mooring line behavior – how chain hangs between the fairlead and seabed under tension • Relationship between water depth, total chain length, and horizontal vs. vertical components of tension • How higher line tension affects the amount of chain that lifts off the seabed

💭 Think About

• First, visualize the mooring line profile: with 3,150 ft of chain in 600 ft of water, what parts of the line are most likely to be lying flat on the seabed? • Think about how increasing line tension changes the catenary – does more or less of the chain stay on the bottom when tension is high? • Use the manual’s tables/curves: which tension and water depth entry matches 220 kips and 600 ft, and how do you read off the length lying on bottom from that data?

✅ Before You Answer

• Confirm you are using the correct water depth (600 ft) and exact tension (220 kips) line in the manual’s table or curve. • Verify you understand which column or axis in the manual corresponds to “chain on seabed” versus total line length or line angle. • Check that your chosen answer is less than or equal to the total chain length (3,150 ft) and is consistent with a realistic catenary shape in 600 ft of water.

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