Question 3747 Deck General

The correct answer is B) 2 spare charges. According to the regulations, for mobile offshore drilling rigs, the number of spare charges that must be carried is equal to the number of hand portable fire extinguishers on the unit. Since the question states there are four hand portable fire extinguishers, the rig must carry 2 spare charges to be able to recharge each of the four extinguishers if needed. The other options are incorrect because A) 1 spare charge is not enough to cover all four extinguishers, C) 3 spare charges is more than necessary, and D) 4 spare charges, while sufficient, is not the minimum required by the regulations.