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Systems would be fully marinized for suitability at sea and use salt water for pumping. Drive systems can be electric, diesel or petrol depending on location.


Firefighters are protected from thermal heatwave improving firefighter welfare.


THE CAPABILITY


A Cobra system can pierce any shipbuilding material and will cut through 10mm steel in <40 seconds. As the hole is made by the water and abrasive combination no additional equipment is needed to get the water in to the fire area. It is also possible to cut a large hole with the Cobra should you wish to also add a traditional nozzle or monitor should a significant amount of water be needed.


The Royal Swedish Navy (Fig 2) developed a way to identify the optimum location of the Cobra to be applied by adding Cobra Access Points - visual indicators to give the fire fighter a preferred location of deployment. This can be important for server or electrical systems rooms, i.e. compartments where you don’t want Cobra to pierce through a wall into important equipment or pipework. Typically, the Cobra will be used through a door. CAPS support faster and safer operations.


Research made by the Royal Swedish Navy and others has found that the cutting extinguisher and its methods


provide or contribute extensively with the following:


• Safe and rapid re-entry procedure at shipboard firefighting through mitigation of backdraft and flash overs, as well as rapid cooling of fire gases.


• The method requires much less crew than standard firefighting procedures alone, which leaves more crew available for the mission/supplementary functions.


• Boundary cooling from inside the vessel or from adjacent decks.


• It is a complement to traditional firefighting equipment.


Figure 2 – On board a Visby Corvette and “S” indicating the Cobra Attack Point


• In comparison with traditional boundary cooling, the cutting extinguisher concept uses a minimal amount of water – which decreases stability issues and collateral damage.


• The concept is easy to understand and is easy to train and practice onboard.


• Excellent system for redundancy on breach of fixed installed fire suppression systems.


• The cutting extinguisher can be used where fixed installed fire suppressive systems and other measures don’t reach; void areas, trunking, cavities, ducting and containers for transportation.


• Retrofitting to comply as an equivalent to new classifications/ standards are possible and very cost effective.


• Increasing parallel method development in civil firefighting enhance possibilities to benchmark and cross-train.


LI-ION BATTERIES Firefighting on car carrier vessels and other RORO vessels containing electric vehicles is still in development. This year Cold Cut Systems undertook a scientific study and trials with a large car manufacturer on their electric vehicle batteries and demonstrated a direct way of supressing fires in the battery modules. Direct impact was seen during thermal runaway and the limiting of propagation. The study also checked the state of the battery modules for a week afterwards to detect any potential for re-ignition and showed the application of Cobra to be effective. Skoda had completed their evaluation last year and determined that Cobra should be the preferred choice of firefighting equipment in the use of suppressing fires in their


86 | The Report • June 2021 • Issue 96


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