The influence of bottom time on preflight surface intervals before flying is recommended in the user's guide.
After a single 60 fsw, 55 min no-stop air dive, low DCS risk was found for a 11:00 preflight surface interval.60 fsw no-stop dives with 75 and 95 min total bottom times.There were trials for a 60 fsw, 40 min no-stop dive and a 120 min decompression dive.The 40 min trials began with a 12:05 PFSI which was reduced to 0:05 after three incidents.The 120 min trials began with a 22:46 PFSI (USN guideline) which was reduced to 2:00 (nine incidents in 281 trials) and was rejected with six incidents.The 40 min dive and the single 120 min decompression dive had low-risk PFSIs that were 12 hours shorter than the repetitive 75-95 min dives.With the dry, resting conditions of these dives, low-risk PFSIs appeared to be sensitive to dive profile characteristics such as bottom time, repetitive diving, and decompression stops.It is not known if this is for wet dives.