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One would indicate an emergency eyewash. Another would indicate a corrosion hazard. And another would indicate the position of fire extinguishers, or of the First Aid.
Nitrogen can be used in fire extinguishers as gas propellant.
FIRE extinguishers are used to put out fire.
No, there are boats that do not need any fire extinguishers.
Fire extinguishers are best used on incipient (at the beginning) fires.
Class K fire extinguishers are designed to supplement kitchen fire suppression systems.
Class K fire extinguishers are designed to supplement kitchen fire suppression systems.
In Oklahoma, one can find fire extinguishers in any public building. US law requires public buildings to have fire extinguishers to be prepared in the event of a fire.
There are several types of fire extinguishers that one should purchase that rely on their compact form and low weight such as Alert 5 Rechargeable fire extinguishers, and Tundra Tundra extinguishers.
No. You'll need to provide the required fire extinguishers for your boat yourself.
Specialist websites such as FireMart.co.uk sell fire extinguishers. Amazon offers this as well. I suggest you read up on fire extinguishers and usage before you purchase.