In my personal experience, it is always a good practice to remain conservative and wait at least 24 hours before air travel after diving. heliox or trimix).ĭepending on the Scuba Diving Agency or Scuba Operator you are diving with, these recommendations might vary slightly. multiple days), as well as the gasses used (air or recreational enriched air mix vs. technical or decompression dives), your dive intensity (single day vs. In a nutshell, factors affecting your surface interval before flying or going to altitude are your dive profile (recreational vs. Note that the results of the study were used by the US Navy in 1999 to revise its rules for ascent to altitude following air diving. These recommendations are the result of 802 trials conducted by the Duke University Center for Hyperbaric Medicine and Environmental Physiology between 1992-1999, together with continuous feedback and reports submitted by divers to DAN. Single or multi day repetitive dive with decompression Multi-day repetitive dive, no decompression The following table summarizes the minimum surface interval you should conduct for different types of dive profiles, according to the Divers Alert Network (DAN). As you might suspect, the higher the frequency of your dives or the deeper your dives, the higher the level of nitrogen accumulation in your blood. However, in practice, the time lapse between your last dive and the time you board a plane depends on the types of dives you are doing. As conservative as it may seem, this ensures that a sufficient amount of time has passed for the residual nitrogen in your body to be expelled, substantially reducing the risk of decompression sickness. As a general rule you should make a 24-hour surface interval before taking a plane.
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