🔍 Key Concepts

• Class A vs Class B fire extinguishers and what type of fire each is intended for • Requirements for unmanned oil (tank) barges during transfer operations in 46 CFR Subchapter D • How the presence or absence of cargo pumps aboard affects the required size/number of extinguishers

💭 Think About

• What class of fire does oil or petroleum cargo represent, and which extinguisher class is normally used for flammable liquids? • If the barge has no cargo pumps aboard, where could a fire most likely occur during transfer, and how might that affect the size/number of extinguishers? • Look at the size codes (II vs V). Which represents a larger capacity extinguisher, and does an unmanned barge with no pump room usually need the largest one available or a more moderate size?

✅ Before You Answer

• Confirm that the requirement is for a Class B extinguisher (flammable liquids), not Class A • Verify whether the regulation calls for one portable extinguisher or two on an unmanned barge with no cargo pumps • Check in the tables that for no cargo pump aboard, the specified size rating is B-II vs B-V, and match that to the options given