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>From: Manos Manoli[SMTP:manos@ma*.co*.cy*] >Subject: Table Vs Abyss > >Iam doing a simple Wreck dive on 42meters this weekend on Trimix. >I run the plan on Abyss and then i thought to compare with the iantd >table ? >So at the end of the day one of them or maybe both are bulshiting me. >Why is there so much deference between a simple dive like this ? >Which one you would dive ? > >So the results on 25minutes on 42 meters with 19%he 28%o2=A0 was: > >Abyss: >12 Minutes on O2 at 6 meters. > >Iantd tables: >1=A0=A0 min on 12 meters >3=A0=A0 min on 9=A0=A0 meters >12 min on 6=A0=A0 meters on O2 >15 min on 3=A0=A0 meters on O2 The O2 %age is bit high (1.46 on the bottom). Both tables seem a bit long. The IANTD ones are probably longer because they have to cater for the = worst case (overweight, unfit dehydrated etc diver). Also, why use O2 at 3m? 6m is = much better. Decoplan, with an instant descent (so a real 25 bottom time), with GFLo = of 30% and GFHi of 100% gives: 1m @ 15m (on 19/28) 1m @ 12m (on 19/28) 2m @ 9m (on 19/28) 5m @ 6m (on 100%) Using a 50% mix for deco gives: 1m @ 21m (on 50%) 1m @ 18m (on 50%) 1m @ 15m (on 50%) 1m @ 12m (on 50%) 1m @ 9m (on 50%) 5m @ 6m (on 50%) Spending a bit more time at 21m ( to take advantage of the Oxygen Window) gives: 5m @ 21m (on 50%) 1m @ 18m (on 50%) 1m @ 15m (on 50%) 1m @ 12m (on 50%) 1m @ 9m (on 50%) 2m @ 6m (on 50%) (Use these at your own risk. I just ran some numbers through the = program). Given the choice between the Abyss and the IANTD tables, I'd go for the Abyss one. Given a real choice, I'd use the last set of Decoplan tables. Iain -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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