mario posted on марта 23, 2013 17:37
As you ascend you are ridding your body of nitrogen in your tissues and bloodstream. If you ascend too quickly, you risk decompression sickness. Always do a safety stop at 15 feet for at least 3 minutes after deeper dives. After your safety stop, do not propel yourself to the surface either. Ascend that last 15 feet very slowly also.