Question 4358 Deck General

The correct answer is D) 48. When deballasting from ballast tank 2S on the DEEP DRILLER, valve 48 on the starboard side is the valve that needs to be opened. This is based on the specific configuration and plumbing of the ballast system on this vessel, which is information that would be covered in the training and licensing requirements for operating this type of offshore drilling unit. The other answer choices (8, 19, and 20) are incorrect because they do not correspond to the specific valve that must be opened for deballasting from tank 2S on the DEEP DRILLER, as per the design and operation of this vessel's ballast system.