🔍 Key Concepts
• USCG fire extinguisher classification system (Type B and size numbers I, II, III, etc.)
• Typical CO2 extinguisher weight ranges used on vessels
• Difference between extinguisher rating (B-I, B-II, B-III) and the charge weight in pounds
💭 Think About
• How does the size number (I, II, III) relate to the amount of extinguishing agent in a portable CO2 extinguisher?
• Among 15, 25, 35, and 45 lbs, which weight best matches what you would expect for a large portable CO2 extinguisher that can still be handled by one person?
• Think about what size CO2 extinguishers you have seen on vessels: which listed weight most closely lines up with the bigger, but still portable, unit?
✅ Before You Answer
• Make sure you are thinking about portable CO2 extinguishers, not fixed systems.
• Confirm that a Type B-III is larger than a B-I and B-II, so its charge weight should be correspondingly higher.
• Check that the weight you pick is a realistic charge weight for a unit that can be carried and operated by one person.