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The Oxygen breathing apparatus (OBA) is a closed circuit oxygen rebreather. used primarily in firefighting by the US Navy. Its oxygen is generated by chemicals contained in the green canister, which is inserted at the base of the breathing device. [1] The scrubber canister uses potassium superoxide as both a carbon dioxide absorbent and as an ...
The Clearance Divers Breathing Apparatus (CDBA) is a type of rebreather made by Siebe Gorman in England. The British Royal Navy used it for many years. [1] It was for underwater work rather than for combat diving. The main oxygen cylinders are on the diver's back. The oxygen cylinders at the front of the diver are for bailout.
A store of oxygen, usually as compressed gas in a high pressure cylinder, but sometimes as liquid oxygen, that feeds gaseous oxygen into the ambient pressure breathing volume, either continuously, or when the user operates the oxygen addition valve, or via a demand valve in an oxygen rebreather, when the volume of gas in the breathing circuit ...
Some types are also referred to as a compressed air breathing apparatus (CABA) or simply breathing apparatus (BA). Unofficial names include air pack, air tank, oxygen cylinder or simply pack, terms used mostly in firefighting. If designed for use under water, it is also known as a scuba set (self-contained underwater breathing apparatus).
The SDBA (Special Duty Oxygen Breathing Apparatus) is a type of frogman's rebreather breathing set. Many of the world's navies and army marine corps have used it since 1971. It was made by Mercury Products in Billingshurst in England. The breathing bag is square with rounded corners, on his chest, exposed.
It had one or two oxygen cylinders, across the lumbar part of the back: often one, but this image shows two. Its duration in use was one or two hours, dependent on the size of oxygen cylinder fitted. Its absorbent (tradename Protosorb) was loose in the bottom of the breathing bag, restrained by a perforated cloth partition, and not in a canister.