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What is a Rebreather (Closed Circuit Rebreather CCR)?

According to my knowledge, a Rebreather (also known as a Closed-Circuit Rebreather (CCR)) is a device that absorbs the carbon dioxide from our exhalations and recycles the unused oxygen and inert gases from our exhalations. The device would replenish the oxygen that the user has metabolized after analyzing each exhalation.

CCR would extend significantly the amount of time that a diver can stay underwater by comparing it with Open Circuit Diving, where the complete exhalation would go directly to the environment.

Some of the other advantages of CCR are that they provide much better dive and decompression efficiency, gas savings as you are not exhaling into the environment, silence (the bubbles are really noisy!) and that you will look so much better with a piece of fancy, high tech equipment (Simanek, n.d.).

I have done only a discovery dive with a rebreather, and I was fascinated by all the technology and complexity of them. I still do not have the training or understanding of how they work or lack the experience in order to provide an informed opinion on which would be the best stage in the diving career for an individual to start, nevertheless, there are agencies that allow you to complete the Open Water Course with a Rebreather, I suppose that as long as the diver strictly adheres himself with the conditions of the diver training, there should be no problems, unfortunately, I consider that the skill of evaluating the conditions, and if they fit the past training conditions is slightly beyond an Open Water diver that was recently certified.

What is your opinion on CCR Entry Level Diving?

After discussing rebreathers slightly with a few of my colleagues, I have learned that each rebreather manufacturing company has its own certification because each piece of equipment varies so much from one another, that specific training must be taken in order to be able to dive using that manufacturer’s unit.

For example, after an individual receives a certification to be able to dive Poseidon’s rebreathers, to dive Liberty’s rebreathers, that individual must take Liberty’s rebreather training. Therefore, your certification will also have which type of rebreather you are certified to dive with.

After having said that, it only comes to one’s mind… the following questions…

Which is the best rebreather?

How many options do I have?

To which I have no answer, but perhaps would be a great entry for the next blog entry that my more experienced colleagues could easily answer.

By Frank G.

Reference:

Simanek, J. (n.d.). Divesoft. 7 steps to becoming a rebreather diver. Divesoft blog. Retrieved March 28, 2022, from https://www.divesoft.com/en/blog/7-steps-to-becoming-a-rebreather-diver