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Steve: Have you checked the Canadian DCIEM tables? They give 30 metres 15 minutes as max no-stop for that depth. Now the question is what is "safer"? How "safe" do you want to be? ... = Knowing that "safety" in diving is not an absolute but more a matter of = diving within your limits and avoiding Murphy... I'm afraid it's easy to be dogmatic about this, and give you certain = answers, (ie. tell you whick is the "best" table) but the simple truth = of things is there's still so much that is unknown about the way the = human body reacts to pressure changes... However, it does seem that the DCIEM tables are well tested and were = made from the start using doppler detection of circulating bubbles to = reduce the incidence of DCS in divers who use them. I'd be perfectly happy using DCIEM, however I regularly use Buehlmann = tables for air (or Nitrox single mix) dives. Another table that you may want to consider are the "new" French Navy = or Marine Nationale table of 1990, they seem reasonable, at lest when = compared with the "old" GERS tables that said 30 min/30 metres and no = deco stops!. Perhaps you should compare your table collection for other values, ie. = 21 metres, 36 metres, 42 metres, not only for no-stop, but also = looking at various bottom times and deco stop depths and times. That = would give you a broader perspective... Regards Conrad Daubanton >De: Steve Orrell >Para: >Asunto: Tables for Suunto dive computer >Fecha: Mi=E9rcoles 25 de Marzo de 1998 8:59 > >Sender: owner-techdiver@aquanaut.com >Received: from bighorn.terra.net (bighorn.terra.net [199.103.128.2]) > by hil-img-9.compuserve.com (8.8.6/8.8.6/2.10) with ESMTP id CAA00942; > Wed, 25 Mar 1998 02:58:57 -0500 (EST) >Received: (mail@lo*) > by bighorn.terra.net (8.8.6/jr3.9) for > id CAA30196; Wed, 25 Mar 1998 02:37:01 -0500 >Precedence: bulk >Errors-To: owner-techdiver@aquanaut.com >Received: from bighorn.terra.net (root@lo*) > by bighorn.terra.net (8.8.6/jr3.9) with EXEC for techdiver > id SAA11748; Tue, 24 Mar 1998 18:21:30 -0500 >Received: from post.mail.demon.net (post-10.mail.demon.net [193.195.0.15= 4]) > by bighorn.terra.net (8.8.6/jr3.9) with SMTP for <techdiver@aquanaut.co= m> > id SAA11738; Tue, 24 Mar 1998 18:21:26 -0500 >Received: from belay.demon.co.uk ([158.152.103.170]) by post.mail.demon.= net > id aa1017461; 24 Mar 98 22:45 GMT >From: Steve Orrell <steve@gp*.co*> >To: techdiver@aquanaut.com >Subject: Tables for Suunto dive computer >Date: Tue, 24 Mar 1998 22:44:47 GMT >Organization: GPS Internet Marketing >Message-ID: <351823b2.916170@po*.de*.co*.uk*> >X-Mailer: Forte Agent 1.5/32.451 >MIME-Version: 1.0 >Content-Type: text/plain; charset=3Dus-ascii >Content-Transfer-Encoding: quoted-printable > >Hmm, probably a confusing subject line but never mind, it's the best I c= ould >come up with ;-) > >I'm hoping someone can help me solve a conundrum I think I have. > >I write as a relative newcomer to diving [based in the UK] who is very m= uch >of a mind to be thorough about my dive planning. > >I am now the proud owner of a Suunto Solution Nitrox dive computer (DC),= and >a very capable piece of kit it looks too. However what I am looking for = is >an appropriate paper-based table to closely match the characteristics of= the >DC to use to help plan my dives and to have with me in laminated format = as >backup should the DC go belly up in mid-dive. Unfortunately I am not sur= e >which set of tables would suit my purpose (and have access at the mo' to= >only a few anyway) and it is this point that I am asking advice on; > >I _know_ I'm not going to get a perfect match but what I am looking for = is a >best fit compromise, so which tables would best suit my purpose? In >particular I am looking for opinion of tables others than those I've lis= ted >below... i.e. tables that I have not yet seen or may be totally unaware = of. > >(I should also mention that I am looking for air tables.) > > >Here are a few of my own thoughts / observations: > >- Both the DC and PC-based software have simulation capabilities but the= se >are restrictive in terms of quickly assessing permutations (as with the = DC) >or accessibility (as with the PC-based software). > >- The Suunto manual mentions that the algorithm they use are derived fro= m US >Navy tables with modifications based on research by Dr Merrill Spencer..= =2E >but the standard US Navy tables are not conservative enough for my likin= g >(and don't correspond very well with the actual characteristics of the D= C). > >To look at other tables I am using as a benchmark the max no-stop dive t= ime >in various tables to a depth of 30m, and then comparing divetimes at oth= er >depths to try and get a close fit. > >- The Suunto DC at setting A0 (least conservative) gives 18mins @ 30m >- Buhlmann '89 gives 17mins @ 30m (=3D1min mandatory stop: as per all di= ves) >- BS-AC '88 gives 20mins @ 30m >- US Navy 1973 gives 25mins @ 30m > >From advice I have taken it seems that 20 minutes is a sensible cut-off,= >anything longer than that is "too long". > >Any advice or opinion would be very welcome, as would be any pointers to= web >sites with table(s) that I might use. > >Many thanks, > > > > > > >Steve... >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.= > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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