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Take whichever statement you like but I was a Saturation Diver in the late 1970's as well as many other variations of surface supplied diving and SCUBA. I have been diving since 1970 and today I still dive at work here in Hawaii for a tourist Submarine company, where I am the Chief Diving Officer / Lead Diver. I have about 10 -12 thousand hours in the water and hyperbaric systems and an associates degree in Marine Diving Technology. I have been there and done that a few times. I never saw a watch crystal pop off regardless of the watch having a HRV or not. There was a step in the decompression procedure to have each diver open the crown of their watch during the five days or so of saturation decompression.
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