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It sounds like it was just joint pain and not explosive DCS. Why didn't they just get back in the water. If the boat was already on the way back the first thing I would have done was drive up to Morrison with a couple of tanks and dive back down to 100' and come back up slowly. Spending a long time in the 20' - 10' range. It has worked for me and several buddies in the past for things such as joint pain or skin bends. The quicker you get back in the water the better and chambers are most of the time hours away. A little common sense goes a long way.