Bristol Channel Diving Services

Click here to edit subtitle

Poseidon Rebreather
AP Inspiration Rebreather 
All on air, and trimix

Poseidon Discovery Mk VI & SE7EN and AP Inspiration rebreathers

Poseidon Mk6 & 7

The Poseidon Discovery is the world’s first rebreather for recreational divers. It’s a fully-closed, fully-automated unit that will make you see your diving in a different light. 


The system comprises a breathing loop (mouthpiece, hoses, counter  lungs and backpack) with associated electronics module, and two independent gas cylinders. One contains 100% compressed oxygen which is added to the breathing loop as the diver consumes it. The second cylinder typically contains compressed air "diluent" to compensate for compression in the breathing loop as the diver goes deeper. It’s also act’s as a back-up system, containing enough air for the diver to breathe directly in an emergency from the bailout valve fitted to the mouthpiece.


The Discovery will fit straight onto most BC’s or wing systems with absolutely no modification needed. 


The dive is fully managed by the onboard computers, with two continuously recalibrating sensors constantly monitoring oxygen levels, and dive information recorded in the removable battery module. The hand-held control unit displays depth, cylinder pressure, and oxygen concentration, and a host of other features. The system is also equipped with a number of active warning systems.


To begin the dive, the diver must ensure that the battery is charged, the bottles are filled with gas and the pre-packaged scrubber is attached. The computer then performs a thorough pre-dive test to ensure that all parts of the system are functioning properly before the dive is allowed to proceed. 


Light, safe and simple to use, the Discovery is designed not only for seasoned divers, but for those who are new to the experience. With so much less to do, you’re free to concentrate on the dive itself. And with no bubbles to frighten the sea life, it’s a dive you’ll enjoy more than ever! It’s also a dive you can enjoy for longer, with the potential to stay under water for up to three hours, at up to a current maximum depth of 40m.

At just 18 kilos (39.6 lbs) fully gassed up and ready to dive, the Discovery Mk VI and Mk7 weighs less than many dive tanks weigh on their own. And minus tanks and canister, it weighs just 8 kilos (17.6 lbs), making it very easy to travel with. 


The Discovery has been built with the future in mind, Poseidon have recently announced that a 100msw Trimix upgrade is now available. The unit is already fitted with decompression software, so should you overstay your welcome, the Discovery will work out any decompression for you.

They have also recently announced the arrival of the solid state O2 sensor, watch this space, this has the potential to revolutionise O2 cells and their reliability !

We are more than happy to talk to you about the Mk6 / Mk7, and offer you try dives and training with the Discovery unit’s that we have so you can try before you buy.

Our  PSAI Discovery MK VI / 7 CCR Course is run by Neil (PSAI instructor trainer # 158, TDI # 4867) as a four day course that covers all aspects of the unit itself and CCR diving in general.

Tha AP Inspiration rebreather

The Inspiration started the CCR revolution. It was the world's first affordable production unit setting benchmark standards in performance, quality and safety - and the first CCR to offer worldwide training and support networks. 

  • The Inspiration is Unique: With multiple Patented features. Not gimmicks, but absolute essentials like independent Dual Oxygen Controllers, CO2 Scrubber Monitor, audible alarms, fibre-optic HUDs…
  • Benchmark Design: Such as, Oxygen Control accuracy (+/- 0.05 Bar of Setpoint) that set the CE standard - to mention just one of the Inspiration’s many ‘firsts’… 
  • Versatile: One unit - all depths. Configure from Recreational spec to Trimix. Your choice.
  • Easy to Prep: Quick start-of-day set-up and end-of-day replenish.
  • Easy to Dive: Streamlined fit, a dream to fly, with ease-of breathing in all positions.
  • Customise Your Unit: More upgrade options allows you to build your Inspiration to suit you.
  • Intuitive Controls: Simple step-thru calibrate and test. Dive with clarity, control and ease.
  • Redundancy Built-in: Unique back-up oxygen control & power sources, multiple independent

Our  PSAI / TDI AP Inspiration CCR Course is run by Neil (PSAI instructor trainer # 158, TDI # 4867) as a four or five day course, depending on agency, that covers all aspects of the unit itself and CCR diving in general.

Train on Our Units: £610 (includes all gas, scrubber, materials etc)

On Your Unit: £550 (includes all gas, scrubber canisters, materials etc)

Unit Crossover Course: £360 (excludes gas, scrubber canisters. Includes materials)

Instructor Course: £520 (excludes gas, scrubber canisters. Includes materials)

Try Dives: £45 and this cost is refunded against the cost of a unit should you decide to purchase one. Duration is 1 hour and includes all gas, scrubber canisters etc.