Question 3478Deck General70% to pass
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?
AI Explanation
The correct answer is B) 1,422 feet.
The formula to calculate the length of chain lying on the bottom is: Chain on bottom = Total chain length - (Water depth / Scope ratio)
Given:
- Water depth = 600 feet
- Total chain length = 3,150 feet
- Scope ratio = 5:1 (typical for anchoring)
Plugging these values into the formula:
Chain on bottom = 3,150 feet - (600 feet / 5) = 3,150 feet - 120 feet = 1,422 feet
The other answer choices are incorrect because:
A) 994 feet is too short
C) 1,728 feet is too long
D) 2,550 feet is too long
The length of chain lying on the bottom can be calculated using the provided formula, which takes into account the water depth and the typical scope ratio used for anchoring.
Related Questions
#3476 An LWT anchor often has difficulty tripping in _______________.#3477 The DEEP DRILLER is moored in 600 feet of water. The average line tension is 190 kips. What is the total vertical component of chain tension? #3479 The emergency power system for the DEEP DRILLER should be placed in operation when the weather forecast predicts winds greater than 90 knots and when _______________.#3480 The DEEP DRILLER is anchoring in 600 feet of water. In the absence of environmental forces, the mooring lines should be adjusted to _______________.#3481 In a storm, the leeward lines of a MODU's mooring system will _______________.