Hi Jean,
the Voyager range of rebreathers have undergone quite a few changes over the past few months. Originally the company was called Aquatek, but they have changed the name of the company to HBT ( Human Breathing Technology) The website is
Human Breathing Technology They have being doing a lot of work lately with DAN Europe and Pascal Barnaby.
They have a few different versions of the Voyager available. The Sport is a pre mixed SCR unit with constant flow orifice. This can be changed by the diver before the dive to suit dive depth and nitrox mix.
The Voyager Modular is a fully closed circuit rebreather. It is between a Kiss and a Pelagian in concept. The O2 is a continious flow design but is controlled by a needle valve. This has to be set before the dive and cannot be changed during the dive like the Pelagian ( i am working on it though) It is a very modular design in that the cylinders can be either way up. For trim purposes in a wetsuit i have the cylinders deinverted with manual Dil and O2 valves coming over my shoulder like the 'Boris. It works well and is infact a very well made unit. It also has a dump valve on the base of the scrubber like the Sentinel to vent water in the event of a flood.
The company are making a prototype at the moment with an unusuall scrubber desing that should be interesting.
Hope this helps.
Aaron.