Alladin Sport is a 9 or 6 (cant remember) tissue BUHLMANN model computer with extra fudge factors. It should always give slightly longer deco than pure Buhlmann. (I own one!! long retired), so I cant see how it gave less deco than pure tables, unless it is faulty. The only way to get the deco down this low would have been to do a quick bounce to the bottom and then get up shallow very quickly. Having said that its algorythm is considered very lenient by todays standards
If you've done that dive many times before with the same deco, then you're a very very lucky man, I certainly wont be doing that on air, and I would't use a Buhlmann model either
Both you and your partner are VERY lucky to have got away with this (and previous) dives. I stand by my comments, You need MORE training in decompression and you need to plan your dives in advance, not just swim around until the computer says so as you have discovered. If you cant accept that you screwed up on this dive and need to change your procedures and planning, then give up diving now or you will end up in the pot again
If you run these dives through ProPlanner, GAP, DDPlan, DPlan, VPlanner, ZPlanner, BSAC 88, Buhlmann, RDP, DCIEM etc etc you will see that you need a LOT more decompression (most suggest around 30 - 40 mins worth on the first dive alone). Proplanner was the least conservative with 28 mins of stops starting at 23m (Assuming Square profile 37m for 25mins).
By the way I can read, and 45mins TDT - 8mins deco - 4 mins Ascent does not = the 25 mins BT you used in your last post, it = 32 mins, quite a difference especially on deco
I have every sympathy for people who get bent due to no fault of their own, following planned dives. But to omit 20 mins of stops, relying on a single borrowed computer during an unplanned dive???? and then blame the computer!
How was your buddy calculating his deco by the way? what did his computer and or tables say? why didn't you follow them? and why did he do 2 mins less deco than you, A buddy pair should do the same deco, not split up in the water
I'm sorry, but wake up and smell the roses before its too late, you screwed up big time through your own ignorance and bad diving practices (I'm certain SCOTSAC teach you how to plan and calculate deco). You cant deny this as the evidence is slightly stacked against you. Dont bother with excuses, learn something from this!!! PLAN THE DIVE, DIVE THE PLAN and never ever rely on a single device
If you really really really still believe you did nothing wrong and that you didn't break the deco rules then I'd suggest you get tested for a PFO
Feel free to flame away if it makes you feel better, I have a thick drysuit and thick skin underneath. I havn't yet managed to get a bend in nearly 3000 dives down to 140m (touch wood) so I must be doing something sorta right
Computers and tables use the same algorythms underneath or similar variations of these algorythm's, Pushing either to the limits is bad. Pushing beyond these limits almost always gets you in the pot!!! as you now know. Both deco calculation methods are only as good as the people using them
This is not intended as a flame post and I dont want to start a war. I just want you to learn something from your experiance and download some deco programs, learn how to use them and run your dives through them before you do them, That way you have a mental sanity check of what a computer is telling you and can plan your gas and bailout requirement in advance. Also take at least 2 ways of measuring depth and dive time with you on every dive (and cross check them)
(NOT SAYING THIS APPLIES TO YOU, but its kind of related)
I work in a dive shop accasionally and the amount of folks we get in who cant use their computers properly is frightning, I had one guy just before Xmas convinced his TDT display was his NST, When we downloaded his profiles from his recent red sea trip, He'd been to 68m on air and missed 32 mins of stops on his last dive!!! (and got away with it!!!!). Claims as he wasn't deco trained, he couldn't do deco and therefore could ignore the deco stop stuff on the computer!!!!!!!!! If only life was a simple as this guy