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I see a lot of agencies, organizaions, etc. beyond the traditional groups offering"certification" courses of different types (Nitrox...trimix..) . Each group is very different. Some are also online courses. What is considered recognized, or are they all recognized? Of course when I...

Please look at attached picture of MRI images I thought that since I have read so many posts concerning divers that are mistreating their sinuses and or sufferring from diving related sinus issues that it might be good to see what happens when you rupture a sinus cavity (in this case your...

I think that all divers should read Jacques Cousteau's book "the silent world" . One can really learn about the sport thru the early pioneering (tru for anything). Fantastic book. You will be amazed that he did not die early in life. One of last centuries greatest engineer, scientist, explorer...

Anybody have any comments and/or experiences with this site you would want to share? Particularly currents? driftdive? bugs? interesting ROIs? appreciate it!