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The BSAC Twin-set Diver introduces an experienced club diver to the theme of self-sufficiency within buddy diving. You will learn how to become your own first port of call in an emergency and understand the equipment needed for this.  Whether you’re looking to dive a back mounted twin-set or in a side-mount configuration … this course is for you!

What you will learn

You will develop your knowledge of twin-set diving including:

  • Kit configuration and ancillary equipment stowage.
  • How to respond to kit failure.
  • Practical twin-set diving techniques, including gas isolation and shut-down drills.
  • Multi-contingent dive planning for more adventurous diving, including run-time schedules.

What  the Twin-set Diver Course entails

The course includes four theory sessions, a dry practical session and a dive-planning session. It also includes a sheltered-water lesson, and two open-water dives with planned run times of between 25 and 40 minutes. These dives will be to a maximum depth of 35m (or within your qualification limits) and will ensure that you have plenty of in-water time to practise the skills and discipline needed for twin-set diving. 

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

What does the Twin-set Diver Course enable you to do?

A Twin-set Diver is competent to plan and conduct dives using a twin cylinder configuration within the limits (including depth and breathing gases) of their diver certification.

An Advanced Twin-set Diver is a Sports Diver who has successfully completed Twin-set Diver and Accelerated Decompression Procedures (ADP) courses. They can plan and conduct dives to an extended maximum depth as defined by the current maximum air or nitrox depth limit recommended by BSAC, currently 40m, using breathing gases that they are certified for.


To enrol on the Twin-set Diver course you must have already successfully completed the BSAC Sports Diver course with a 35m depth certification (or have equivalent certification from another recognised training agency including decompression and rescue capabilities). 

You should also have 20 or more logged dives as a Sports Diver.