BSAC’s Explorer Mixed Gas CCR Diver (60m) course is a great way to extend your existing closed-circuit mixed gas diving skills to 60m.

You’ll learn to manage two stages underwater, to follow an efficient open-circuit bailout plan, if needed, that minimises your deco time. The course complements the Sport Mixed Gas CCR Diver (50m) course and students with suitable experience and skills can combine the two in one event.

I wanted to be able to dive deeper but with a clear head due to less narcosis.  I now have the skills to dive with mixed gas and two stage cylinders to explore deeper sites safely and also remember more of the dive.

- Mick Cook, Chorley SAC

Explorer Mixed Gas CCR Diver (60m) introduces a Sport Mixed Gas Diver (50m) to the use of a second bailout gas to support CCR diving using normoxic trimix with oxygen concentrations down to 18 per cent, to dive to depths of up to 60m.

To enrol on the Explorer Mixed Gas CCR Diver course you must be at least 18 years old and must have already successfully completed a Sport Mixed Gas CCR Diver (50m) course (or have equivalent certification from another recognised training agency). You must be able to demonstrate high proficiency diving a rebreather, including 30 CCR dives logged in the 30m to 50m range.

You will extend the diluent gas mixes that you can use, learning to use normoxic gas mixes containing at least 18 per cent oxygen and a maximum of 35 per cent helium to minimise the narcosis you would otherwise suffer at depth. You will learn to plan and conduct dives to 60m, and extend your practical diving skills to manage two stage cylinders.

The Explorer Mixed Gas CCR Diver (60m) course includes a dry practical session to review your kit set up, a sheltered-water lesson to practise managing two stage cylinders, an assessed dive-planning session and an assessed open-water mixed-gas dive to a maximum depth of 60m. If you attend a combined Sport Mixed Gas CCR Diver (50m) and Explorer Mixed Gas CCR Diver (60m) course, the kit review and sheltered-water lessons are optional refresher sessions, delivered depending on your level of deep-diving experience and familiarity with the dive kit appropriate for a 60m dive.

This is a continually assessed course during which students must reach the required performance standards.

An Explorer Mixed Gas CCR Diver is competent to plan and conduct CCR dives using gas mixes containing at least 18 per cent oxygen and a maximum of 35 per cent helium. This will extend your maximum dive depth to 60m.

You could do this course at a regional event, local club or a Technical centre. Not all clubs and technical centres run Explorer Mixed Gas CCR Diver (60m) courses, so please check if you are interested.

Alternatively, book your place on a scheduled Explorer Mixed Gas CCR Diver (60m) course online now.

Not a BSAC member? You can do this course by joining BSAC directly or joining via a local club. Find a club.

Students will be given a pack of supporting learning materials. You will need full open-water dive kit suitable for local conditions, including two delayed surface marker buoys and other surface detection aids, and the relevant rebreather. You will also need two fully kitted stage cylinders with a minimum capacity of seven litres each, fitted with second stage hoses of at least 1.5m, to use as independent alternate sources.

After completing an Explorer Mixed Gas CCR Diver (60m) course and consolidating your skills, your options for deeper expedition diving significantly expand.

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