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Folks
This is a topic of great interest to me, having recently purchased a
computer. I will be using it for purely no-decompression diving. But,
I do not yet trust electronics under water.
I am planning a trip to Cuba next week, and am worried about what the
manual tells me regarding failure. In essence, it says to stay out of
the water for 48 hours. This is not an option on a one week dive
vacation. My plan is to use the planning function of the computer to
plan the days diving (2 to 3 dives). If the computer craps out I want
to be able to switch to my PADI Recreation Dive Planner for the
remainder of the trip. The computer dives will however have violated
the RDP. The RDP rules recommend you stay out of the water for 24+
hours on any violation. This would appear to be conservative, but less
so than the computer manufacturer.
Now for the unsubstantiated information. I remember reading (source
unknown) that someone had done a bunch of simulations and came up with
the following:
If your computer dies on a dive vacation and
A) you have not violated any of its limits
B) you have been no-decompression diving.
you should stay out of the water for 4 hours, and then consider
yourself a "D" diver for the next dive that day using the RDP.
Does anyone have enough information on the various computer models being
used to verify this idea? BTW I do not intend on following this advice
until I have a better understanding of decompression theory and can do
the figuring for myself.
ttfn
David Pearson
In message "continue diving after computer failure?", u18218@kb*.be*
writes:
>Hi fellow divers,
>
>I while ago i started a thread on scuba-l about what to do when
>your computer for one reason or another fails in the middle of a dive.
>(unlikely but .... Murphy likes diving also!)
>
>The question was : can one continue the dive on multilevel tables ?
>(if you have a depth gauge and a timer)
>
>Of course the easy way out is to abort the dive , do safety stops
>and wait on surface until offgassed to start again with a fresh
computer or on
>tables.
>
>But suppose you are on a luxury dive safari tour and 3 more dives are
scheduled
>before going back on land again.
>
>I summerize (try to) the feedback of the thread to some extent as
follows :
>
> - In order to continue one has to rely heavily on memory
> (where was i at the time of failure) and since this
> is not so reliable one should abort the dive and do
> safety stops.
>
> - You cannot adequately and safely map a computer dive
> profile to pressure groups on a table.
>
> - Some divers 'follow' their computers
> (do you plan a dive and dive the plan ?) :
> from computers to tables ... it should be the opposite
> way !
>
>I selected some options which seems safe to continue the dive.
>Maybe you have something to add or comment about.
>
>Here are the 'few' SAFE options besides bailing out :
>
>- You plan your dives on a table (multilevel) or on a PC
> and use your computer as backup or diveplan-check-device
> and having a timer and depth gauge you can safely
> continue the dive if you dive according your plan.
> (you need to have the plan with you on a slate for instance)
> You can do other dives using the same table but if you want to check
> your diveplan you need another computer and because a new computer
> starts with zero ongassing you should be completely offgassed.
> NEVER NEVER NEVER use someone elses computer !!!!!
>
>- If you do not use tables , you can continue if you use
> a backup computer and you have that with you on any
> dive you make. Besides I think that if you dive EAN you
> should set both computers to the same mixture right ?
> (this is another risk factor to account for !)
>
>Maybe there exists other SAFE ways .. I wonder.
>Anyone out there ?
>
>Meanwhile happy SAFE diving !
>
>--
>________________________________________________________________
>
> Xavier Merlin #### ###########
> ## ## ## ##
> Kredietbank NV ## ## ## ##
> 8484 Projectgroep IBIS Technisch ##### ########
> Havenlaan 2 ## ## ## ##
> B-1210 Brussel ## ## ## ##
> Belgium #### ###########
>
> Tel +32 (2) 422 7487 Fax +32 (2) 422 8106 E-mail u18218@kb*.be*
>________________________________________________________________
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