The Closed Circuit Rebreather Course teaches divers how to set up, calibrate and safely dive a rebreather. Now you might ask: Why is diving a rebreather any different than diving open circuit? Why is special training needed to dive these units and what benefits will a rebreather provide?
As divers, we know that each time we inhale air from our scuba tank and exhale through our regulator there is a large stream of bubbles associated with the exhalation. We also know that depending on our planned depth, the tank will only last a certain amount of time. Depth and breathing rate dictates how long our open circuit tank will last. A rebreather works a bit differently.
Fully closed Circuit Rebreathers don’t produce any bubbles, well not until we begin to ascend anyway. The air inhaled from a rebreather is captured, circulated to our lungs and recirculated back into the rebreather, hence the name rebreather. You can imagine if the air is being recirculated then air is not escaping into the surrounding environment. Simply put, this mean no bubbles! And no bubbles can be a good thing when you are taking pictures and the marine critters are shy and suspicious of the noises created by your open circuit set-up. You will find marine life tends to accept you as one of their own when you are on a rebreather. You can get close without scaring them and you will have a better opportunity to see more of their natural behavior when you are able to get closer.
The rebreather works by passing the exhaled air through a scrubber that removes the carbon dioxide generated by and exhaled by our body. The unit also adds small amounts of oxygen to the recirculated air to maintain a proper pressure of oxygen so you can continue to dive. And dive you will, longer and a bit warmer than on open circuit. The typical rebreather, diving with a set point of 1.3, allows about 3 hours of bottom time at 60 feet.
We are still subjected to nitrogen absorption, even when diving a rebreather, but the advantage the rebreather gives us is that it is making nitrox while we dive. This means that at any given depth (recreational limits as well as technical), the rebreather is providing us with the best possible gas mix and this is how we can stay down a bit longer. The added warmth comes from the chemical reaction of the scrubber when it is removing CO2 from our exhaled breath. This reaction produces heat as a by product and this means the air we breathe from a rebreather is warmer than air coming from an open circuit configuration. There are many more advantages of a rebreather, call us and ask. Better yet, stop in and sign up for one of our rebreather demo sessions.
There are 3-5 lectures, a confined water session and up to eight open water dives to complete the rebreather course. This is a whole new way of diving and you need proper and thorough training and it takes a little more time than your beginner diving class did.
Courses available on the following units: Inspiration, Evolution, Optima, Megaladon, KISS
Tuition: $1500.00 + consumables
Rebreather Rental: $750.00 (for the entire course)