CO2 Supplementary Sign – FS0026

CO2 Supplementary Sign – FS0026

This IMO supplementary sign is a plain text plate reading “CO2”, used alongside a fixed fire-extinguishing pictogram sign to identify the specific extinguishing medium protecting a space or system. The CO2 supplementary sign removes any ambiguity about which gas a fixed installation, bottle, or release station uses, which matters because different extinguishing agents call for different evacuation and ventilation precautions before entry.

Where this CO2 supplementary sign is used

This sign is fitted beside or below the main pictogram sign at fixed fire-extinguishing installation panels, release stations, and machinery space entrances protected by a carbon dioxide flooding system. Pairing this CO2 supplementary sign with the pictogram, such as the fixed fire-extinguishing installation sign, gives crew and visitors both the symbol and the plain-text confirmation of what agent will be released, which is especially important for anyone unfamiliar with the vessel’s specific system layout.

Because a CO2 flooding system displaces oxygen in the protected space, this supplementary sign is also fitted at compartment entrances to warn that evacuation must be complete and confirmed before the system is released, and that the space must not be re-entered until it has been proven safe by test or ventilation. Keeping this sign clearly legible at every relevant entrance is a direct life-safety measure, not just a labelling convenience.

During weekly and monthly fire equipment inspections, crew confirm that this CO2 supplementary sign remains legible and correctly paired with its associated pictogram sign, and that it has not become separated from the installation it labels during repainting or maintenance work. A supplementary sign found missing or illegible should be replaced immediately, since misidentifying the extinguishing agent protecting a space can lead to a serious misjudgement during an emergency.

This sign is checked during SOLAS fire safety surveys, where the surveyor confirms that fixed gas extinguishing systems are correctly identified at every release point and protected space entrance, with the extinguishing agent clearly named alongside the standard pictogram. A vessel with consistently labelled CO2 installations demonstrates that its fire safety documentation and physical signage are properly aligned.

New crew are shown this sign during safety inductions as part of learning to recognise which compartments are protected by gas flooding systems, since entering a space after a CO2 release without confirming it is safe to breathe is a recognised cause of serious injury and death on vessels carrying fixed gas suppression systems. This sign is commonly ordered alongside the fixed fire-extinguishing bottle sign used to mark the storage location of the CO2 cylinders themselves.

Because CO2 systems are also fitted to machinery spaces, paint lockers, and cargo holds in addition to accommodation-adjacent compartments, this supplementary sign appears throughout a vessel wherever a gas flooding system protects an enclosed space, not only at the main engine room entrance most crew associate with fixed extinguishing systems.

Fixed CO2 systems are periodically inspected and function-tested by qualified technicians, and this supplementary sign should be checked at the same time to confirm it remains attached, legible, and correctly positioned alongside its pictogram sign. A worn or missing supplementary sign is one of the smaller but still reportable findings during external fire safety audits, since it directly affects how quickly crew can identify the hazard associated with a specific installation.

Some vessels also fit this CO2 supplementary sign near ventilation dampers and shutdown controls associated with the protected space, since a full CO2 release sequence typically requires closing ventilation and stopping fans before discharge to keep the gas concentration effective. Having the extinguishing agent clearly named at each of these related control points helps crew work through an unfamiliar release procedure correctly under the pressure of an actual incident, rather than relying purely on memory or a posted procedure card.

Technical specifications:
SKU: FS0026
Compliant: IMO Resolution A.1116(30)

• Fire-retardant marine-grade material
• Available in non-glow vinyl, general purpose glow, or DNV Wheelmark certified Class C / Class D photoluminescent film
• Waterproof and saltwater resistant
• Glossy wipe-clean finish
• Peel-and-stick installation, no tools or drilling

Supplied ready to apply directly to a clean, dry surface beside its associated pictogram sign. Available in the standard size shown above.

This sign is produced to IMO fire control symbol specifications for consistent recognition across international fleets. Need a different size? Contact us for a quote.