Fire Pumps and Fixed Systems in the Engine Room
Fire pumps, the fire main and fixed engine-room systems must remain ready for use. Checks concern the ship’s arrangement: power supply, water circuit, required performance and restoration after intervention.
Operational Explanation
The main fire pumps supply the fire main, with its hydrants, hoses and nozzles. Where required, the emergency pump maintains a means of supplying the main if a fire makes the main pumps unavailable. Independence concerns the approved arrangement: power source, sea connection, pipework and separation from the affected compartment, as well as access to the controls.
Fixed engine-room systems complement this protection using gases such as CO₂, foam or water-based systems, according to the approved installation. For water-based systems identify water spray, water mist and any local application systems: the generic name “sprinkler” alone does not describe the space's protection. Recognising the protected space or hazard, release modes and interlocks is part of familiarisation.
Pumps and fixed systems belong in the PMS and fire-protection maintenance plan, with their respective tasks. A pump starting does not, by itself, demonstrate delivery to the hydrants at the required performance; a fire-main test does not document CO₂ availability.
Regulatory Reference
SOLAS II-2/10.2 addresses the fire main, pumps and water availability; II-2/10.5 addresses machinery-space protection. Number, performance and separation depend on the ship and applicable arrangement. FSS Code chapter 12 addresses the emergency pump within its scope; chapters 5–7 distinguish gas, foam and water spray/water mist systems. Use the edition and amendments applicable to the ship. SOLAS II-2: text adopted by MSC.99(73); FSS Code: original instrument MSC.98(73).
SOLAS II-2/14 requires readiness, testing and inspections, with a plan kept aboard. MSC.1/Circ.1432, as amended by MSC.1/Circ.1516, provides the minimum recommended level for the equipment covered, to be combined with maker instructions and flag/class requirements. Fixed CO₂ systems have specific guidance in MSC.1/Circ.1318/Rev.1.
SOLAS II-2/4.2.2 addresses remote closing for specified oil-fuel tanks and protection of hot surfaces. These controls share the fire scenario but retain their own method and frequency: do not derive the quick-closing-valve frequency from the emergency fire-pump frequency.
MSC.1/Circ.1432 distinguishes monthly pump operation to verify adequate pressure from annual flow/capacity testing; for the latter it specifies testing the emergency pump with isolation valves closed. Identify the valves on the approved arrangement and follow the procedure: do not indiscriminately close valves or cause a blackout to demonstrate independence. MSC.1/Circ.1432, §§5.1 and 7.1, with amendments; MSC.1/Circ.1516.
For CO₂, before intervention take precautions against accidental discharge, inform personnel and apply the prescribed compensating measures while protection is unavailable. Afterwards verify correct restoration of controls, connections and interlocks under the procedure. MSC.1/Circ.1318/Rev.1, §§2–3 and 6.2.3.
Scope of Application
Ships subject to the relevant SOLAS II-2 requirements. Check type, gross tonnage, construction or conversion date, spaces and equipment installed, any approved equivalents and flag/class requirements.
The arrangement is not identical for all ships: II-2/10.2.2.3.1 distinguishes passenger ships of 1,000 GT and above, on which a fire in one compartment must not make all pumps unavailable, from the branch for cargo ships and passenger ships below 1,000 GT requiring an emergency pump if that fire could put all pumps out of action. Identify the actual approved branch and installation rather than imposing the same configuration on every ship.
For a cargo ship with periodically unattended machinery spaces (UMS) or a one-person watch, verify the immediate water delivery arrangement in II-2/10.2.1.2.2: remote starting of a main pump or permanent pressurisation. The Administration may waive this requirement for cargo ships below 1,600 GT if the pump starting arrangement in the machinery space is in an easily accessible position. Distinguish this requirement from the automatic/manual release modes for fixed local application systems required within the scope of II-2/10.5.6.
Procedure / How to Complete It
- Identify the task in the plan: pump operation, flow/capacity test or inspection of a specific fixed system. Confirm interval, method, acceptance criteria and competent personnel.
- Agree the test scope, communications and prescribed measures for any temporary loss of protection with the responsible shipboard personnel.
- Carry out the prescribed checks for the main pumps and, separately, the emergency pump: supply arrangement and pipework, measurement points and performance required for the task. Flow verification follows the specified method; recording a start alone is insufficient.
- Check the installed fixed system using the relevant method, including alarms, controls and interlocks where provided. For CO₂ apply the safety plan against accidental discharge; specialist tasks belong to the personnel specified in the plan.
- Record equipment, task, conditions and measurement points, criteria, actual results and anomalies. Link the PMS record and any technical reports or engine-log entries.
- Verify and document restoration of the readiness arrangement. Manage defects and follow-up under the SMS without closing a task as passed merely because testing took place. Coordinate relevant activities with fire drills while keeping maintenance and familiarisation distinct.
Practical Example
Educational scenario: a cargo ship has a diesel emergency pump and a fixed CO₂ system. The monthly pump task specifies an arrangement and check points in the ship's plan. The technician records the power source used, hydrant identification and measured pressure, comparison with the specified criterion, any anomaly and the final system status; the record can be referenced in the engine log.
If the pump starts but the pressure fails to reach the specified criterion, the result is a failure: the PMS retains the defect and the follow-up directed by responsible personnel. The annual flow/capacity test remains a separate task. The CO₂ visual inspection also follows its own plan; its result cannot be inferred from the pump test.
What Typically Goes Wrong
Common Mistakes Mistake Library
| Mistake | Consequence | How to avoid it |
|---|---|---|
| Testing the emergency pump without verifying its power and pipework configuration | The recorded start does not demonstrate availability of the intended emergency arrangement | Use the approved method and identify the power source, sea connection and relevant valves |
| Checking pressure only at the point nearest the pump | A shortfall at the most unfavourable points may remain unnoticed | Check the points specified by the ship's method; do not assume the furthest point is always the hydraulically most unfavourable |
| Applying the pumps' schedule and type of test to fixed systems | Specific CO₂, foam or water-mist tasks may be omitted or replaced with an irrelevant check | Schedule each system using the relevant guidance, plan and maker instructions; different intervals alone are not an error |
| Closing the task without verifying restoration of protection | Valves, controls or interlocks may remain outside the service configuration | Document return to service and any residual limitations under the procedure |
What the PSCO Checks
Operational Tips
- Read the circuit diagram, fire-control plan and system instructions together: identify what remains available if a compartment is affected by fire.
- Use the measurement points and criteria of the specified method; distinguish available pressure from flow/capacity testing.
- Keep pump and fixed-system tasks separate within the PMS, with specialist service reports where required.
- Connect familiarisation with fire drills, UMS and standby arrangements; an emergency fire-pump test does not automatically require a blackout test or the emergency generator's timing criteria.
Preparation checklist
Educational checklist. This summary supports learning and preparation only. It does not replace the vessel’s approved procedures, manuals, statutory documents, company SMS, or applicable official requirements. Completing it demonstrates neither compliance nor readiness for an inspection: it shows that a list has been read, not that the ship is in order. Always verify the current documents carried on board.
- Ship type, equipment, protected spaces and applicable requirement branch identified
- Plan and method for each task known, with criteria and competent personnel
- Main and emergency pumps checked in their respective arrangements; pressures and flow recorded where required by the task
- Fixed systems checked with the relevant method and CO₂ safety managed
- Results, anomalies and follow-up linked to PMS records and available reports
- Restoration of the arrangement documented and limitations communicated to responsible personnel
- Familiarisation and fire drills coordinated without replacing maintenance tasks
FAQ
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Certified substantive revision: 12 October 2026 · page fingerprint 9309b7870eb0