FS-312 Fire Submarine:
FS-312 Fire Submarine's are Designed to put out fires underwater and can survive any temperature underwater. Fire submarines can also put out underwater fires. Although fire submarines are not yet created, Submarines use sound waves to identify where they go underwater and locate specified areas (The National Museum of American History, 2000). Additionally, A submarine can propel itself underwater and on top of water surfaces (Encyclopedia Britannica, 2020). Underwater fire requires a combustive substance and an oxidizer and is maintained by an underwater bubble (Lee, 2016). To be extinguished, Thermite requires a high temperature of burning strips of magnesium and light and is almost impossible to extinguish. It can burn through pavement and can stay on fire underwater (Limer, 2016) .Additionally, electric currents created by energy can put out an underwater fire (Fisher, 2020). There are also underwater fire extinguishers that can be used to put out an underwater fire.
More information:
Underwater fire submarines are not yet invented; however, submarines were originally invented in 1620 by Cornelius Drebble (Encyclopedia, 2020) FS-312 Fire Submarines are driven like any other submarine, using diesel-electric engines (Woodford, 2019). Fire Submarines are not being used by anybody today, however submarines are used widely throughout the navy and military. If FS-312's existed, they would be produced by underwater fire extinguishers, but they are not yet manufactured. They would also be used Shipwrecks and oil spills within the United States Coast Guard fleet, and any other military branch, there are Zero FS-312 Fire Submarines.
scientific context:
How do water fires happen most often? Class A fires include ordinary combustibles such as wood, paper, cloth, trash, etc. The best extinguishing agents for an A fire are water or chemical foam. Class B fires involve flammable or combustible liquids. The best extinguishing agents for a B fire are carbon dioxide, dry chemical or aqueous film-forming foam \\ Class C fires involve electrical equipment. The preferred extinguishing agent is carbon dioxide. Dry chemicals can be used. Class D fires involve combustible metals, like magnesium. The best extinguishing agent is a dry powder suitable for the metal involved. This class of fire is not likely to occur on a fishing vessel (Tiger, 2016).
Underwater fires are not naturally occurring, Magnesium forms a type of combustion with oxygen and forms a fire underwater (Quora, 2020). To water, fire can allow harmful chemicals and various pollutants to enter the water. Fire also harms the underwater ecosystem (Maxson, 2018).
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References:
Carigiet (2018). Can fire occur underwater? Quora. Retrieved from https://www.quora.com/Can-fire-occur-underwater
Encyclopedia Britannica (2020). Toward Diesel-Electric Power. Britannica. Retrieved from https://www.britannica.com/technology/submarine-naval-vessel/Toward-diesel-electric-power
Fisher (2020). If water contains hydrogen, which is flammable, why doesn’t it burn? Science Focus. Retrieved from https://www.sciencefocus.com/science/if-water-contains-hydrogen-which-is-flammable-why-doesnt-it-burn/
Lee (2016). How do underwater flares and torches work, when water puts out fires? Cornell Center for Materials Research. Retrieved from https://www.ccmr.cornell.edu/faqs/how-do-underwater-flares-and-torches-work-when-water-puts-out-fires/
Limer (2016). Yes, This Thermite is on Fire Underwater. Popular Mechanics. Retrieved from https://www.popularmechanics.com/science/a16076/thermite-on-fire-underwater/
Maxson, 2018). The Impact of Wildfires on Water. The Center for Watershed Protection. Retrieved from https://www.cwp.org/the-impact-of-wildfires-on-water/
The National Museum of American History (2000). Submarines in the Cold War. The National Museum of American History. Retrieved from https://americanhistory.si.edu/subs/work/exploring/research/index.html
Tiger (2016). Marine Fire Extinguishers. Boating Magazine. Retrieved from https://www.boatingmag.com/marine-fire-extinguishers/
Woodford (2019). Submarines. EXPLAINTHATSTUFF! Retrieved from https://www.explainthatstuff.com/submarines.html