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Mark Powell

NASA Johnson / Flickr / CC BY-NC 2.0

Do What You Teach and Teach What You Do

01 Sep, 2022     Training

The Evolution of Dive Planning

12 Jun, 2018     Theory

Permanent Change: When Have We Learnt?

03 Jan, 2018     Training , Theory

Achieving Our Teaching Objectives

26 Sep, 2017     Training

One for all or all for one?

23 Apr, 2013     Training , Technical Diving

But I want one... Switching to rebreathers after diving open circuit scuba

07 Nov, 2012     Rebreathers

Skills for Technical Diving

23 Feb, 2012     Technical Diving

Technical Diving Equipment

13 Oct, 2011     Technical Diving

Team Diving

13 Oct, 2011     Training

Lessons from Technical Diving

13 Oct, 2011     Technical Diving
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About X-Ray Mag

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Compiled by an international network of top dive editors and world class underwater photographers, X-RAY MAG is the planet's only truly global premier dive lifestyle magazine. Subscription and downloads are free. Published since 2003.

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