Rebreather diving - Closed Circuit
Closed Circuit Rebreather course “AP Inspiration & AP Evolution”
Introduction
The AP Valves Inspiration & Evolution rebreathers have revolutionized recreational and technical diving over the last several years. Quite simply this units offer tremendous advantages for all theatres of diving. The system works on electronic controlled 0xigen injection which means that as 0xigen becomes metabolized by our bodies; the system automatically replaces the used 02 with fresh gas. Our metabolism does not change with depth, so the system is as gas efficient at 10m as it is at 100m. The inboard 2 or 3 litre cylinders allows an average of 6 hours dive duration at any depth. As the majority of technical diving is below 30m, we feel that this system is ideal as it maximizes the use of EANx to it is full potential.
The other major difference of the closed circuit system is that it maintains a constant P02 during the dive. This means that instead of planning a mix for a given depth, the rebreather constantly changes the mix to suit the depth you are at. This way the system is continually changing the 02 content to maximize 02 levels, and therefore minimize N2 levels. There is an increase in dive time over conventional OC or SCR Nitrox diving. Naturally the CCR is a more complicated piece of equipment and requires more involved training, but it isn't beyond the realms of most competent divers. If you hold an Advanced EANx certification and have good buoyancy and discipline, then CCR diving should not be too difficult.
The units are CE approved to 160 meters
AP Inspiration & AP Evolution Closed Circuit Rebreather course
Module on air diluyent:
Day 1 - 8 hours of academic development: Reviewing the history of rebreather development and closed circuit rebreather use. A refresher on “Nitrox” diving physics including: constant PPO2 theory and CNS% tracking. The history and an in-depth discussion of the rebreather, including electronics workshop.
Day 2 - 4 hours of confined water training developing the survival skills needed to use the unit. Set point management, buoyancy control, semi closed rebreather mode, oxygen rebreather mode, bailout skills and mouthpiece management drills to mention a few!
Post dive maintenance and cleaning.
Day 3 -2 Open water dives averaging around 60 minutes per dive practicing all of the skills learnt during the confined water training. These dives are done in shallow water.
End of day post dive cleaning and maintenance.
Day 4 - 2 Open water dives averaging around 60 minutes per dive practicing all of the skills learnt during the confined water training. Average dive depth on these dives will be 20m.
End of day post dive cleaning and maintenance.
Day 5 - 2 Open water dives once again averaging around 60 minutes per dive practicing all of the skills you have been doing during the week. Average depth here will be 25 meters.
Post dive cleaning and maintenance.
Day 6 - An opportunity to use the unit on a dive between 30 and 40 m. End of dive trip, cleaning and maintenance. Graduation!
At Rubicon Diving, Lanzarote, our experienced instructors can take you through the steps of learning this exciting development in recreational diving. With all the latest materials and individual attention we will ensure a fantastic experience whilst you enjoy the wonderful volcanic landscape and new approach to the variety of fish species we encounter daily.








