In the late 1990’s I taught the Draeger Dolphin semi closed rebreather. So I was very excited to be able to finally take the TDI Hollis Explorer Diver Course and see how a semi closed hybrid system might bridge the gap between that old technology and new. The first thing you notice about the […]
The Dive Rite O2ptimata CCR has been around for a decade and is very well established. As you would expect from a progressive company of actual divers that constantly tweak products according to their own real diving experiences & customer feedback, the O2ptima has had its fair share of updates in that time. However, none […]
