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Hi Charles: Fortunately for all of us, deco is not even remotely as precise as you seem to think. The stops are nothing more that a way to FORCE you to do a SLOW ascent. Ascend slowly, (what I feel is the most critical aspect of decompression), do your deep stops and enjoy the dive. Then gauge the success / failure of your deco by how you feel a few hours after the dive. If you decompressed properly, you will feel energetic. If it was less than optimal you will feel sluggish. If that happens, modify your deco until you find what works best for you keeping in mind that more is not always better. Sometimes, the cleanest decos are also the shortest decos and the same time span spent on deco will yield different results depending on where in the water you allocate it and with which gas you do it. Good luck. Joe Citelli ----- Original Message ----- From: Charles Roth <divr555@ho*.co*> To: <mikey@ma*.co*> Cc: <techdiver@aquanaut.com> Sent: Monday, March 05, 2001 5:54 PM Subject: Re: Underwater timers. > I do have a bottom timer. I use a Vyper in gauge mode as my primary gauge > and have a OMS(aka-Uwatec) as my backup. Unfortunately, both of these timers > only count in full minute increments. My deco program (Abyss RBGM) has 30 > second intervals on it's deco stops. When I mean stopwatch, I mean just > that. Something that I could start/stop and reset for each stop. This would > be in addition to my bottom timer, not to replace it. > Deco stops are kind of boring and an idle mind has lots of room to wander > while hanging there. Consider this: If you dive a 240fsw dive for 25 > minutes, you will have 17 deco stops. If you ascend at 30fpm it would take > you 20 seconds to arrive at your next stop. If you do not take this into > account, then you would shorten your total recommended deco time by about 6 > minutes (17stops X 0.33minutes=5.661 minutes). If you decide to wait for > your timer to hit the next minute (0.66 seconds) and then count your deco > time, you will hang an additional 12 minutes over your recommended deco time > (17stops X 0.66minutes=11.22minutes). Since I do have the RBGM program, I > would like to take advantage of the short, deep stops that it recommends. > It might seem trivial but I do like to strive for accuracy in my dive > planning AND it's execution. > I was down at Brownies Third Lung in Ft. Lauderdale the other day and they > mentioned using a stopwatch function bottom timer so I was wondering if such > an item exists, other than in the form of a dive watch. This question was > more to satisfy my curiosity and not so much to be an "I gotta have one > now!" type of question. > > Chuck R > > >From: Mike Rodriguez <mikey@ma*.co*> > >To: "Charles Roth" <divr555@ho*.co*> > >CC: techdiver@aquanaut.com > >Subject: Re: Underwater timers. > >Date: Mon, 05 Mar 2001 09:10:45 -0500 > > > >At 09:39 PM 3/4/2001 -0500, Charles Roth wrote: > > > > >I was recently down at a local dive shop in Ft. Lauderdale and they were > > >talking about using a bottom timer with stopwatch function. I've never > >heard > > >of such a beast but would be interested in finding out if such a timer > > >exists. It would be a boon in timing my deco stops. Does anyone know if > >a > > >bottom timer with stopwatch function does exist? > > > >What do you mean by 'stopwatch'? Do you mean something you can > >start and stop as it counts up? Why not just use runtime as in > >an Uwatec bottom timer that counts up starting at the beginning > >of your dive? > > > >-Mike Rodriguez > ><mikey@mi*.ne*> > >http://www.mikey.net/scuba > >Pn(x) = (1/(2^n)n!)[d/dx]^n(x^2 - 1)^n > > > > _________________________________________________________________ > Get your FREE download of MSN Explorer at http://explorer.msn.com > > -- > 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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