The number of fire-extinguisher that are required to be carried onboard motorized boats depends on the size of the boat. The main purpose of fire extinguishers is for the protection of the motor engine. Thus, For a 26 and 40 feet in length, at-least two B-I extinguishers or one B-II are required to carry.
You are required to carry a quantity of 5-B or 20-B UL-rated USCG approved extinguishers as required in the chart shown here for recreational boats 65 feet in length and less. There are also 10-B rated extinguishers available.
Fire Extinguishers – BoatUS Foundation
In addition to meeting the carriage requirements for the correct number of extinguishers for the size of your boat, they must be labeled as 5-B, 10-B or 20-B, extinguishers labeled with B-I or B-II only are no longer acceptable. Extinguishers must not be more than 12 years old according to the date of manufacture stamped on the bottle
If your boat is between 26 and 40 feet, you need either two 5-B fire extinguishers or a single 20-B fire extinguisher. And finally, if your boat is between 40 and 65 feet, you need either three 5-B fire extinguishers or one 20-B fire extinguisher and one 5-B fire extinguisher. If your boat is longer than 65 feet, check the federal regulations.
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How many fire extinguishers do I need on my Boat?
Boats less than 26′ have to have at least one B-1 fire extinguisher on board. Boats 26′-40′ need to have at least two B-1 fire extinguishers on board. If the boat has a USCG approved fire extinguisher system installed for protection of the engine compartment, then the required number may be reduced.
Do you have to mount a 10-B fire extinguisher?
It is highly recommended to mount the fire extinguisher, but it is not a requirement to mount the fire extinguisher. All portable extinguishers must be readily accessible. Q15. Does one 10-B rated fire extinguisher count as two 5-B extinguishers?
What is the difference between a disposable and rechargeable fire extinguisher?
A rechargeable fire extinguisher is recharged once used. A rechargeable portable fire extinguisher requires regular maintenance and servicing; a disposable does not. A disposable must be removed from service after 12 years from date of manufacturing stamped on the bottle.
What is the expiration date on a fire extinguisher?
If your disposable (non-rechargeable) fire extinguisher has a date of manufacture stamped on the bottle (example: “05” means 2005), and it is older than 12 years, the extinguisher is considered expired and must be removed from service.
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FIRE EXTINGUISHER REGULATIONS Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher