Question 4473Deck General70% to pass
In storm conditions, when the environmental conditions are such that the DEEP DRILLER has disconnected the marine riser, the two leeward mooring lines should be _______________.
AI Explanation
The correct answer is B) completely slacked.
In storm conditions where the DEEP DRILLER has disconnected the marine riser, the two leeward mooring lines should be completely slacked. This is because in the absence of the marine riser, the rig is more susceptible to being blown off position by the wind and waves. Completely slacking the leeward mooring lines allows the rig to weathervane and align with the wind and waves, reducing the stresses on the remaining mooring lines.
The other options are incorrect because adjusting the leeward lines to match the windward lines (A) or tightening them (C) would increase the stresses on the mooring system, potentially leading to failure. Slightly slacking them (D) may not provide enough freedom for the rig to weathervane effectively.
Related Questions
#4471 It is proposed to moor the DEEP DRILLER in 600 feet of water in a region in which the effective wind velocity could reach 80 knots, significant wave height could reach 30 feet, and the current could be 1.5 knots. If these conditions occurred at the same time from the beam, the total environmental force would be _______________.#4472 The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (Transit). If weather conditions make it necessary to ballast down to survival, how much ballast would be required? #4474 The DEEP DRILLER is engaged in wire line logging. You have 10,000 feet of drill pipe and bottom hole assembly in the set back. Marine weather forecasts are predicting weather with winds in excess of 70 knots. Your first step to prepare for the storm should be to _______________.#4475 During the passage of a severe storm, the DEEP DRILLER is at survival draft. Strong winds are blowing from the starboard. A careful load form calculation determined that, although the unit is level, the TCG is 2.0 feet to starboard. The value of the wind heeling moment is _______________.#4476 Before deballasting to survival draft in the event of predicted heavy weather, the DEEP DRILLER Operations Manual recommends that the mooring lines be slacked _______________.