In storm conditions in 600 feet of water, completely slacking the leeward mooring line of the DEEP DRILLER reduces the tension in that line to about __________.
• Behavior of a slacked mooring line in deep water during storm conditions • Difference between pretension (normal working tension) and residual tension when a line is fully slacked • Typical tension ranges (in kips) for deepwater mobile offshore drilling unit (MODU) mooring systems
• Think about what happens to line tension when you go from a working load to a completely slacked condition—does the tension go to zero, or is there still some residual load? • Compare the answer choices: which values are more typical of a working storm load, and which values are more reasonable for a slacked line that still has weight and catenary effects? • Consider the water depth (600 feet): how does deeper water affect how much tension remains when a line is slacked?
• Identify which answer choices are more likely to represent full or high working tension in a storm versus minimal residual tension when slacked • Confirm that a completely slacked line should have much lower tension than a line taking significant environmental load • Eliminate choices that seem too high to represent tension in a line that has been described as completely slacked
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