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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'.
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