Siva (rebreather)
Encyclopedia
Siva is a model series of frogman
's rebreather
made by Carleton Life Support originally made by Fullerton Sherwood Engineering Ltd. They are:
The Siva 55 is equipped with 2 200 bar (Inconel) spheres with a total volume of 5.6 liters.
The Siva 55 (55 metres of depth) also known as (CCDA) Canadian Clearance Diving Apparatus works with any one of 3 Nitrox mixes (32.5, 40 and 60 % Oxygen) or pure oxygen. The pure oxygen is used for closed circuit diving so the diver can work without bubbles. The other Nato standard B,C and D mix are standard nitrox mixes used in semiclosed-circuit mode.
Canadian Underwater Mine-countermeasure Apparatus, is a selfmixing rebreather. It works on another principle. A constant flow of oxygen is mixed with a diluent volume dependent on the ambient pressure. The deeper the diver dives, the more diluent is added, the leaner the mix is. The correct setpoint is controlled with a partial pressure measuring device (electronic). The SIVA + is capable for diving to 90 metres. Diluent can be air, trimix or heliox
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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....
's 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...
made by Carleton Life Support originally made by Fullerton Sherwood Engineering Ltd. They are:
- Siva S10 oxygen rebreather, dive duration 4 hours. Worn on the front of the chest.
- Siva S24, usable as oxygen rebreather, or as a semi-closed circuit mixed gas rebreather with maximum depth normally 24 meters, can be set to 55 meters. Worn on the front of the chest.
- SIVA-55 (technical data, images) and SIVA PLUS: superseded by the Carleton ViperViper (rebreather)Viper is a new make of electronic-control closed circuit mixture rebreather made by Carleton Life Support which is fitted with the Juergensen Defense Corporation Mark V Electronic Control System. It is designed for use by combat frogmen, and for diving to remove naval mines which may be sensitive...
. They are worn on the back.
The Siva 55 is equipped with 2 200 bar (Inconel) spheres with a total volume of 5.6 liters.
The Siva 55 (55 metres of depth) also known as (CCDA) Canadian Clearance Diving Apparatus works with any one of 3 Nitrox mixes (32.5, 40 and 60 % Oxygen) or pure oxygen. The pure oxygen is used for closed circuit diving so the diver can work without bubbles. The other Nato standard B,C and D mix are standard nitrox mixes used in semiclosed-circuit mode.
SIVA+
The SIVA +, also known as CUMACUMA
CUMA is a make of rebreather underwater breathing set designed and made in Canada for the Canadian Forces by Fullerton Sherwood Engineering Ltd to replace the Royal Navy CDBA....
Canadian Underwater Mine-countermeasure Apparatus, is a selfmixing rebreather. It works on another principle. A constant flow of oxygen is mixed with a diluent volume dependent on the ambient pressure. The deeper the diver dives, the more diluent is added, the leaner the mix is. The correct setpoint is controlled with a partial pressure measuring device (electronic). The SIVA + is capable for diving to 90 metres. Diluent can be air, trimix or heliox
Heliox
Heliox is a breathing gas composed of a mixture of helium and oxygen .Heliox has been used medically since the 1930s, and although the medical community adopted it initially to alleviate symptoms of upper airway obstruction, its range of medical uses has since expanded greatly, mostly because of...
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