Describe the procedure for the regular maintenance routines to be carried out on the Fixed CO2 fire-fighting system?
Short answer
| Step | Action | Record |
|---|---|---|
| Safety | Lock directional valves/block valve, notify crew, safety plan and comms | Maintenance log |
| Visual inspection | Cylinders, valves, pipework, nozzles, markings | CO₂ inspection record |
| Functional test | Alarms, release mechanisms, pilot gas, time delays | CO₂ test log |
| Cylinder maintenance | Weigh, annual visual inspection, hydraulic testing | CO₂ cylinder log |
| Post-maintenance | Return to service, remove locks/tags, verify readiness | CO₂ system logbook, PMS |
- Safety preparations: safety plan, personnel communication, lock/remove operating arms or shut block valve, notify all personnel, record isolation in CO₂ maintenance log
- Visual inspections: check cylinders, valves, discharge heads, pipework, nozzles, control equipment for corrosion, leaks, damage, obstruction, securing, legible markings at PMS intervals, record in CO₂ inspection record
- Functional testing: test CO₂ release alarms, visual/audible indicators per maker’s instructions, verify pilot gas system integrity/pressure, test time-delay and door release, record in CO₂ test log
- Cylinder maintenance: weigh representative cylinders per PMS to verify charge, annual visual inspection of all cylinders, hydraulic test every 20 years then every 5 years (or if discharged/10% pressure loss/external corrosion), record on cylinders and in CO₂ cylinder inspection record
- Post-maintenance: return valves/controls to normal, remove locks/tags, verify readiness, update CO₂ logbook, inspection/test/cylinder records and PMS, report non-conformities to Chief Engineer and SMS
- Governing instruments: SOLAS II-2/14.2.1.2, MSC.1/Circ.1318, ISM Code §10, Merchant Shipping Act 2025, DGMA, class CMS, maker’s manual
- Officer’s role: perform daily/weekly inspections and functional checks per PMS, ensure safety precautions, verify system readiness, report deficiencies, confirm records, control CO₂ room access
Full answer
The full answer explains each point step by step, with the regulations and figures behind it and the discussion from other candidates. It is in the MEO Class IV section of the Marine One forum, open to members enrolled for the MEO Class IV exam.