What type of fire extinguisher is required on motor boats?

For motor boats, a fire extinguisher type B-I is required. This type of fire extinguisher is specifically designed to combat flammable liquids, which is critical for motor boats given the presence of gasoline and oil that could ignite. A type B-I extinguisher typically contains a specific extinguishing agent that can effectively smother flames caused by a flammable liquid fire, making it suitable for the environment on a motor boat.

While other types of extinguishers serve important purposes—such as type A for ordinary combustibles (like wood and paper), type B-II for larger quantities of flammable liquids, and type C for electrical fires—the B-I type is tailored for the most common fire hazards encountered on motor vessels. Therefore, having a B-I fire extinguisher on board is a regulatory requirement for motor boats to ensure safety, particularly due to the unique fire risks associated with their operation.