🔍 Key Concepts

• MODU (Mobile Offshore Drilling Unit) fire protection requirements in 46 CFR • Distinction between inspection frequency and maintenance/overhaul intervals for fire extinguishers • Typical industry-standard annual vs. multi‑year testing cycles

💭 Think About

• Think about what interval makes sense for safely catching problems with fire extinguishers before they fail in an emergency. • Compare which options sound more like a routine inspection interval versus a long‑term recharge or hydrostatic test interval. • Recall whether most USCG regulations for required safety gear on inspected vessels use a period closer to months or years for basic inspections.

✅ Before You Answer

• Verify the fire protection section for MODUs in 46 CFR dealing specifically with fire extinguishing systems and portable units. • Check whether the rule says "tested and inspected" (shorter interval) versus "hydrostatically tested" (longer interval). • Confirm that the chosen interval is consistent with other portable fire extinguisher inspection requirements on inspected vessels.