What type of boat requires a flame-arresting device?

Motorized boats with internal combustion engines are required to have a flame-arresting device because this safety feature is crucial for preventing the risk of fire or explosion caused by fuel vapors. Internal combustion engines operate by igniting a mixture of fuel and air, and in the event of a fuel leak or malfunction, vapors can accumulate in the engine compartment. A flame-arresting device helps to contain and extinguish any flames that may occur, thereby protecting the vessel and its occupants from potential harm.

This requirement addresses safety hazards associated with the operation of motorized boats, emphasizing the importance of proper equipment in preventing accidents. Other types of boats listed, such as kayaks, canoes, sailboats, and paddle boats, typically do not use internal combustion engines and therefore do not have the same risk of fuel-related fires, which is why they are not subject to the same regulations regarding flame-arresting devices.