![]() They are based on the type and duration of the diving activity, and a key factor that the computer can’t know – does the diver have symptoms of DCS. These recommendations aren’t calculations based on the theoretical tissue load. Massimo Pieri observes while Danilo Cialoni uses ultrasound in a research subject’s heart during flight. * For dives requiring decompression stops, there is little evidence on which to base a recommendation and a preflight surface interval substantially longer than 18 hours appears prudent. * For multiple dives per day or multiple days of diving, a minimum preflight surface interval of 18 hours is suggested. ![]() * For a single no-decompression dive, a minimum preflight surface interval of 12 hours is suggested. Longer surface intervals will reduce DCS risk further. The recommended preflight surface intervals do not guarantee avoidance of DCS. They apply to air dives followed by flights at cabin altitudes of 2,000 to 8,000 feet (610 to 2,438 meters) for divers who do not have symptoms of decompression sickness (DCS). ![]() The following guidelines are the consensus of attendees at the 2002 Flying After Diving Workshop. Revised Flying After Diving Guidelines for Recreational Diving - May 2002 When we looked to Divers Alert Network for advice, here is what we found: Many people think it’s a simple calculation based on the theoretical tissue loading that we have to store to calculate decompression status. We are often asked why our computers do not display a “Time to Fly.” It’s a good question. A recent article in Divers Alert Network brings some new data to the discussion of flying after diving. We do our best to keep on top of what is going on in diving research. At Shearwater, we place a high value in the work being done by the scientific community relating to diving and decompression theory.
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