With traditional open circuit SCUBA, the diver inhales gas from a cylinder and exhales the breath into the atmosphere (open circuit). The gas or oxygen used by the diver (+/- 4%) is a fraction of the total gas wasted by the open circuit.

Closed circuit re-circulates the exhaled breathing gas within a loop and only a small amount of oxygen is added to replace the used/metabolized oxygen by the diver. The carbon dioxide, produced by the diver, is cleaned from the breathing gas by the Scrubber (absorbent). This extends the dive time considerably.

"RAID Closed Circuit Rebreather Diving - Get Close Up and Personal, with the aquatic environment"

You may be a complete beginner and would like a 'Try Dive/Discover Rebreather' before enrolling on your first course, or you may already be a rebreather diver wanting to cross over to the RAID system. Whichever your choice, this will add an exciting dimension to your life!

Go to the Diver Training Login for Registration. Click the register button and follow the 3 Step Process, which includes verification of your email address. Once you have registered, all you need to do is type in your email address and password, and click the Login box.


The RAID system is a comprehensive continued educational programme designed for a variety of rebreather units.

Recreational Rebreather Training

We offer diver training for our recreational range of Rebreather specialities where you can even ‘learn To Dive' whilst using a rebreather or you may already be a recreational diver and want to start diving a rebreather as soon as possible. Our recreational Level 2 and 3 provide a learning path way for those people who have limited diver experience or qualifications.

To certify as a RAID Recreational Rebreather diver, you will be required to complete:
The core rebreather level program/s (Level 2 or 3) which determines the depth limitation and skill levels. Plus, the Rebreather Specialty program, which is the chosen rebreather.

Rebreather certification requires both the core level and Rebreather specialty completed.

In the recreational training you continue your education by completing the next level, reaching a point when you can switch over to the Technical courses (RAID Rebreather Decompression Diver or Limited Trimix) and get full credit for your existing Recreational certifications.

Technical Rebreather Training

The prerequisites required to start a technical rebreather course are much higher than those require for the recreational rebreather training. Like the RAID Recreational path, the entry to the Technical training requires completion of Technical Rebreather Knowledge course and the unit specific Technical Rebreather Speciality course. These two are general combined into one program during initial training.
Any further Technical Rebreather courses after the first with RAID does not require the diver to repeat the Technical Rebreather Knowledge course. Only the unit specific training would be conducted.

The prerequisites for each manufacturers unit / Rebreather may vary however they are generally the same. Details of these may be found under the Tech CCR Diver Program or in the individual rebreather course speciality.

Your continued education will to the next level, the RAID Rebreather Decompression Diver or Limited Trimix programs