Question 4462Deck General70% to pass
The DEEP DRILLER is loaded as shown in Sample Load Form #4, (Drilling). In preparing for approaching heavy weather, the four leeward mooring lines are slacked. These actions reduce the _______________.
AI Explanation
The correct answer is C) natural pitch period.
Slacking the leeward mooring lines reduces the righting moment acting on the vessel, which in turn increases the natural pitch period. This is because the reduced righting moment allows the vessel to pitch more freely, leading to a longer natural pitch period.
The other options are incorrect because:
A) Metacentric height is not directly affected by slacking the mooring lines.
B) The height of the righting arm is also not directly affected by slacking the mooring lines.
D) The righting moment is actually reduced by slacking the mooring lines, not increased.
Related Questions
#4460 The DEEP DRILLER is loaded as shown in the Sample Load Form #4 (Drilling). According to the deck load graph, how much additional deck load could be added on the unit? #4461 You should consider placing the drilling operations of the DEEP DRILLER in standby when _______________.#4463 For a semisubmersible moored in heavy weather conditions, the weather lines should be adjusted so that several lines carry about the same tension, and the leeward lines are _______________.#4464 When clear ice is present while drilling, the vertical transverse moments of the DEEP DRILLER are increased by _______________.#4465 In storm conditions, when the DEEP DRILLER is in 600 feet water depth, and the high-line tension (HLT) is 350 kips, completely slacking the two leeward mooring line tensions reduces the HLT to _______________.