FROGS (rebreather)
Encyclopedia
FROGS is a make of rebreather
Rebreather
A rebreather is a type of breathing set that provides a breathing gas containing oxygen and recycled exhaled gas. This recycling reduces the volume of breathing gas used, making a rebreather lighter and more compact than an open-circuit breathing set for the same duration in environments where...

 for frogmen
Frogman
A frogman is someone who is trained to scuba diving or swim underwater in a military capacity which can include combat. Such personnel are also known by the more formal names of combat diver or combatant diver or combat swimmer....

 using oxygen
Oxygen
Oxygen is the element with atomic number 8 and represented by the symbol O. Its name derives from the Greek roots ὀξύς and -γενής , because at the time of naming, it was mistakenly thought that all acids required oxygen in their composition...

, which has been used by the French Navy
French Navy
The French Navy, officially the Marine nationale and often called La Royale is the maritime arm of the French military. It includes a full range of fighting vessels, from patrol boats to a nuclear powered aircraft carrier and 10 nuclear-powered submarines, four of which are capable of launching...

 and the Commando Hubert since 15 October 2002. It is made by the diving gear manufacturers Aqualung
Aqua Lung America
Aqua Lung America is a Vista, California US firm which makes scuba equipment. Aqua Lung America is a division of Aqua Lung/La Spirotechnique which is on its turn a division of the French company Air Liquide.-History:...

.

Its working parts are in a dark-blue streamlined rounded shell. It can be worn on the front or on the back. It is rated as duration on a filling: oxygen 4 hours or more, soda-lime 7 hours at 21.1° C (70°F).

It is 48 cm = 19.2 inches high, 30 cm = 12 inches wide, 19 cm = 7.6 inches thick. It weighs 14.2kg = 31.3 pounds out of water

If the rebreathing loop fails, it can be switched into open-circuit mode bypassing the breathing bag, as bailout.

External links

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