Which option lists extinguishing agents for the class fire as provided?

• A. Dry Powder, Water, CO2
• B. Dry Powder, CO2
• C. Dry Powder CO2 (Water once Energy has been Secured, turns into an A Fire)
• D. Water, Jettison over the side if possible

Answer: (B)

On a boat, choose extinguishing agents that are effective in confined spaces and around electrical gear, without creating new hazards. Dry powder is versatile because it interrupts the chemical reactions occurring in the flame and can be used on both flammable-liquid and electrical fires. Carbon dioxide smothers fires by displacing the surrounding oxygen, which helps in enclosed areas and is especially useful for electrical equipment. Together, these two agents cover the typical fire scenarios you’d encounter on board a vessel and avoid the dangers associated with water on electrical or liquid-fuel fires.

Water is not appropriate for electrical fires or most flammable-liquid fires on a small craft, since it can conduct electricity and spread flammable liquids, making the situation worse. The idea of using water after securing energy isn’t a standard or safe sequence in onboard fire response, and simply throwing water over the side does not extinguish the fire.