How many B-II fire extinguishers must be in the machinery space of a 175-foot long fishing vessel propelled by engines with 3200 brake horsepower?

Correct Answer: Option C — 4

Under 46 CFR 28.160, fishing vessels with machinery spaces containing internal combustion engines exceeding 1,000 brake horsepower require four B-II fire extinguishers. These units provide the necessary extinguishing capacity to combat potential fuel or oil fires within the engine room environment effectively.