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Answer Wiki. As John suggests, divers that ascend too quickly can get an air embolism. Bends (decompression sickness) is slightly different and requires a diver to have been at some depth breathing a nitrogen mixture for some time. You can get an embolism even if you havenât been down long enough to need decompression stops.
For example, if it takes the diver 5 seconds to come up 10 feet, the diver then waits another 15 seconds before going up another 10 feet. The ascent rate between the different 10 foot mini stops isn't overly critical as long as one does not ascend more than 10 feet at one time and does not rocket to the stop.