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Soda-acid type of Portable fire extinguishers working principle
Fire fighting at sea may be considered in three distinct stages,
detection—locating the fire; alarm—informing the rest of the ship; and
control—bringing to bear the means of extinguishing the fire.
Soda-acid extinguisher
The container of this extinguisher holds a sodium bicarbonate solution.
The screw-on cap contains a plunger mechanism covered by a safety
guard. Below the plunger is a glass phial containing sulphuric acid
(Figure ). When the plunger is struck the glass phial is broken and
the acid and sodium bicarbonate mix.