Gone to school in engineering or have a military diving background? Want to design military underwater breathing equipment for a Military Mine Counter Measures (MCM) diver?

The recipe for the design is actually quite straight forward:

1. Take one cold diver who can't see what he is approaching - including a live mine.
2. Take diver and put him into 80 meters of water for a bottom time of 20 minutes without being surface supplied.
3. Make the his breathing gear so anti-magnetic that it wouldn't even deflect a compass needle.
4. Make the set so quiet that the diver's heartbeat may make more noise.
5. Place diver next to large mine so he can identify it - not the other way around.
6. Bring diver back to surface alive with enough gas to safely decompress.

Chest mounted SIVA S10 Rebreather.
Getting the design right and having it accepted by over 10 of the world's largest navies is exactly what a small firm based in Mississauga (Toronto) Ontario is doing. With over 650 rebreathers in use throughout the world, Carleton Life Support Technologies Ltd. is a recognized leader in underwater military rebreather technology.

Fullerton Sherwood Engineering was started in 1981 by Dave Fullerton and John Sherwood. The two professional engineers were formally in charge of Canada's Deep Dive Facility at the Experimental Diving Unit at the Defence and Civil Institute of Environmental located in Toronto. While at the Institute, they foresaw a need for the improvement to existing underwater breathing apparatus used by the Canadian Forces Diver. On the strength of an unsolicited proposal to the Canadian Government, they succeeded in improving on the design of the Canadian Forces CUMA.. They then obtained the exclusive license to market an enhanced version of the rig called the SIVA 55 - a 55 metre set named after SIVA - the Goddess of War.

With the addition of Bob Turner - a professional diver and design engineer - to their company, they developed the shallow water closed circuit SIVA S10 (8 metres) , the SIVA PLUS (90 metres) and the dual mode SIVA S-24 (closed / semi-closed mixed gas set to 55 metres.). Doug Elsey - an engineer previously with Can-Dive Services and Hard Suits International - rounded out the design team in 1997 and brought commercial diving expertise to the company
Carleton's VIPER Series Rebreather

Carleton Technologies Inc. - based in Buffalo, NY. - manufacturers the electronically controlled Mk 16 for the U.S. Navy. With a successful bid to supply both the Australian and UK Navies with their CDBA 2000 and 2001 (an enhanced Mk 16) , they also realized that the Fullerton Sherwood SIVA line of rebreathers would compliment their CDBA electronically controlled systems. In 1997, they acquired Fullerton Sherwood Engineering and rolled it into their Diving products division and also moved the MK16/CDBA production to the Mississauga location.

With the merger of the two companies, development began on a new SIVA VIPER line of rebreather products. Called the VIPER-SC and the VIPER-E, the set has been designed to be modular and upgradeable. The VIPER-SC is a semi-closed circuit set with a depth capability of 55 meters. With the addition of electronics based on Carleton's very successful CDBA 2000 series, the VIPER semi-closed system becomes a fully closed electronically controlled system with a 90 metre depth rating.

Dave Fullerton, General Manager for Carleton Life Support Technologies - Diving Products Division said, "Our goal was to make simple and reliable underwater rebreathing equipment that could be operated by a military diver in stressful situations. The new VIPER line of rebreathers is based on a proven history of semi-closed and closed circuit systems used by the world's navies for thousands of hours. This new hybrid design will more than accomplish our goal in the years to come."

Website: www.carltech.com/diving