🔍 Key Concepts

• Portable fire extinguisher maintenance requirements on inspected vessels (46 CFR Part 34 / 25 – verify in current regs) • What "partially discharged" means for a CO₂ extinguisher (loss of pressure/agent) • Why a fire extinguisher’s reliability in an emergency matters more than convenience

💭 Think About

• If an extinguisher has been used even a little, what might have changed inside it (pressure, quantity of agent, sealing surfaces)? • On an exam, would the Coast Guard want you to put a less‑than‑100% reliable extinguisher back in service, or treat it as not fully serviceable? • Which choice makes sure the extinguisher is unquestionably ready for a full‑scale fire, not just a small flare‑up?

✅ Before You Answer

• Ask yourself: does any amount of partial discharge guarantee the extinguisher is still within manufacturer and USCG service specs? • Consider how critical it is that a CO₂ extinguisher be completely full and at proper pressure before returning it to service. • Check which option reflects taking it out of normal service until it’s restored to full capability, rather than accepting a percentage loss.