Dive Center Rubicon - Playa Blanca Lanzarote - Your modern and friendly Dive Center in Lanzarote, Canary Islands

Rebreather diving - Semi Closed Circuit

Semi Closed Circuit Rebreather “Dräger Dolphin” Training

Introduction

The Dräger Dolphin is a very simple piece of equipment. It has been designed to use EANx mixtures in a pre mixed cylinder to maximize the duration of recreational dives. It is not intended, nor designed to handle decompression dives, and we personally recommend a depth limit of 40m for divers wishing to use the Dräger.
The system works on a constant flow rate which means that the pre-mixed Nitrox continually flows through a small jet into the breathing loop. The diver simply decides the maximum dive depth, and then selects the appropriate jet size to give enough gas to breathe at the target depth. The diver then cross-references a look up chart to determine what the final 0xigen percentage will be in the loop, and then plans the dive. The deeper the dive, the bigger the jet will need to be to give enough gas, so therefore the available duration will naturally decrease with deeper dives.

This is the reason why we recommend a 30m maximum depth. It is ideal for mid depth to shallow water dives. Between 20m  and 30 m of water, the SCR should give you more than  2 hours of in water time, more than enough, and also good value from the inboard 5 litre EANx cylinder. For bailout you can fit an external 3 litre pony cylinder which for no decompression dives is ideal. There are no electronics to monitor, and the diver simply concentrates on the dive, and monitors a standard contents gauge as per normal “Open Circuit” diving. The scrubber canister should give up to 4 hours duration.

Dolphin Rebreather course

This 2 day course includes a 3 hour classroom session and equipment assembly in which you will learn formulas and tests to check your equipment and plan a successful and safe rebreather dive. We will also conduct a short review of tables and dive planning for Enriched Air diving.

1 Confined Water dive to practice buoyancy skills
4 Open Water training dives


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.