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Hi All, Rodney said; Nitrox in scarpa flow? Scarps is in the ideal air range, ie deeper than 20mtrs and no deeper than 50mtrs. Air with O2 deco is by far the best choice. Rod Nairne. Didi said; Yes i mean NITROX ! Why taking the risk of pure O2 decompression when you can nearly double your no decompression time with a 32 or 36 NITROX in the range around 30 m .i prefer to stay on the bottom and avoid unnecc. hangs. rgds didi And Sue said the wrecks were at the following depths; Konig 40m Kronprinz Willhelm 34m Dresden 34m Koln 34m Brummer 34m Karksruhe 24m ******** Just for interest sake I tried out all three depths (40, 34 and 24m) for both nitrox and air with O2 deco. 40m/60minutes 34m/60minutes 24m/60minutes NTX 27 (1.4 working) NTX 31 (1.4 working) NTX 40 (1.4 working) Ascent 3 Ascent 3 Ascent 3 12m 3 9m 1 No Stops required. 9m 11 6m 11 6m 22 3m 27 3m 36 total stops 39 total stops 72 40m/60minutes 34m/60minutes 24m/60minutes air with O2 deco air with O2 deco air with O2 deco Ascent 3 Ascent 3 Ascent 2 15m 2 12m 1 6m 1 12m 7 9m 9 3m 9 9m 17 6m 9 total stops 10 6m 12 3m 15 3m 17 total stops 34 total stops 55 From this we discover (again!) that everyone is right! I would still use air with O2 though for the following reasons. *No analysis is required, and so it is both cheaper and safer (less chance of mistakes when mixing, and no need to handle HP O2) *You can use the bottom mix anywhere, so last minute change of plan means you can still dive. If you have mixed NTX for 24m and you move to a wreck in 40..... *Air is cheap, and you use more bottom mix than deco gas. Hence you get a lower overall cost. Also O2 remaining in the cylinder can be used for more dives, NTX cylinders need to be drained before refilling. *You have O2 set up and ready to go for O2 IWR if needed. *Tests have indicated that high PPO2's are better tolerated when breathing pure O2 rather than a mixture with the same PPO2. *You don't have to find the guy with the gas panel at the spot where he is now, before he goes somewhere else (like offshore!). Cheers Jason =:) OH... Don't dive these shedules! I just transfered them by *memory* from one screen to the other!!!!! (my memory isn't good!) The total stop times should be right, but the others! I don't know!
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