A recreational vessel is 45 feet in length and has a fixed fire extinguishing system installed in the machinery space. What is the minimum number of 5-B portable fire extinguishers required?

Why B is correct

Per 33 CFR §175.320, Table 1, a recreational vessel 40 feet or more but not more than 65 feet in length requires 3 five-B extinguishers if no fixed system is installed in the machinery space, or 2 five-B extinguishers if a fixed system is installed. With a fixed system aboard, the minimum is 2.