Question 4443 Deck General

The correct answer is C) 7.0 seconds. The safe platform roll period for going on location should be longer than 7.0 seconds when the single amplitude roll angle of the COASTAL DRILLER is 1 degree in 150 feet of water depth. This is based on the guidelines provided in the US Coast Guard regulations for offshore supply vessel stability and watertight integrity. The other options are incorrect because: A) 0.2 second is too short for the given roll angle and water depth. B) 3.2 seconds is also too short. D) 9.2 seconds, while longer than the required 7.0 seconds, is not the minimum safe period.