🔍 Key Concepts

• Class B fires (flammable liquids like oil) and the most effective extinguishing agents for them • The behavior of burning oil on an open deck (spread, re‑ignition risk, wind effects) • Difference between cooling, smothering/blanketing, and interrupting chemical reaction as methods of extinguishment

💭 Think About

• Which extinguishing method is best at forming a continuous blanket over a liquid surface to cut off oxygen and prevent re‑ignition? • On an open, windy weather deck with a large surface area of burning oil, which agent can be applied in volume without violently agitating or spreading the burning liquid? • Which choice is more suited to large-area, sustained application rather than small, localized fires?

✅ Before You Answer

• Identify which agent is specifically designed for flammable liquid (Class B) surface fires on decks and in tanks • Eliminate any agents that may cause splashing or spreading of burning oil when applied with force • Consider which agent the SOLAS and typical shipboard fire plans assume as the primary system for cargo deck oil fires