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

Why C is correct

Per 33 CFR §175.320, Table 1, a recreational vessel 40 feet or more but not more than 65 feet in length with a fixed fire extinguishing system in the machinery space must carry a minimum of three 5-B portable fire extinguishers. Without the fixed system, five would be required.