Regal 3300 Owner's Manual page 37

U. S. Coast Guard approved fire extinguishers are required on all boats.
Besides the minimum Coast Guard requirements always check state
and local agencies for additional requirements and equipment.
Coast Guard approved extinguishers are hand-portable, either B-I or
B-II classification.
U. S. Coast Guard approved hand-portable and semi-portable
extinguishers contain a metal plate that shows the manufacturer's name
and extinguisher type, capacity and operating instructions. They have
a special marine type mounting bracket which keeps the extinguisher
solidly mounted until needed. The extinguisher needs to be mounted
in a readily accessible location but one out of being bumped by people
while underway. All approved extinguishers need to have an indication
gauge.
USCG-Approved Fire Extinguisher Types &
Features
https://www.boat-manuals.com/
Safety On Board
The dry chemical agent is widely used because of
its convenience and low cost. The extinguisher
canister is filled with a white dry chemical power
along with a pressurized gas. It is a good idea to
shake this type periodically because they tend
to "pack" on the canister bottom.
The foam type uses a chemical foaming
agent plus water and is best when used for
fires involving flammable liquids- solvents,
gasoline,oil, grease and various paints. It will
work on fires involving rubber, plastics, cloth,
wood, and paper. It leaves a messy residue. Not
for electric fires.
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