Are there differant types of Rebreathers?
There are actually two types of rebreathers (RBs) on the market. The first and most popular are the semi-closed units such as the Dräger Dolphin or Dräger Ray. The Dräger units will produce a tiny stream of bubbles, use nitrox and are priced far less than the more technical completely closed units (CCRs.) These are mixed gas units used by cave divers, underwater videographers and photographers. They require much more training and maintenance than the semi-closed systems and are priced much higher.
