[diveinfo] [jda@melexis.com: Re: [gavinscooters] time depht gauge & buddy]

[Jean-Sebastien Morisset]

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Date: Wed, 30 Nov 2005 10:16:16 +0100
From: David Jacobs <jda@melexis.com>
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Subject: Re: [gavinscooters] time depht gauge & buddy
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At 20:26 29/11/2005, you wrote:
>I am not saying you can not carry as many timing devices as you want, but 
>I am saying that I personally have never seen the need, but then I don't 
>let that need get created for me, either.

While I agree with all of this, I had an interesting experience a couple 
years ago.
It's dead obvious when your BT goes blank, It's dead and you use your 
buddy's...

However on this one dive it turned out my BT gave a 7m (23ft) shallower 
depth than actual.
We caught it pretty fast something was wrong when I was enthusiastically 
breaking our planned max. depth and my buddy stopped me; but when comparing 
both BT.... which one was showing the truth?
This was on a shore dive with no real references or landmarks and where 2m 
(6ft.) of viz. is considered "good"

Since then I carry a suunto stinger as a "watch" to cross check the BT, and 
be able to do a majority vote with my buddy should something similar happen 
again.
So I can understand Paul's logic; If we are carrying a watch anyway, it 
might just as well show depth too...

however... since my BT is a uwatec BT calibrated for fresh water, and the 
stinger is calibrated for salt water... they don't show the same depth 
anyway ;-)
Especially at greater depth...

David



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-- 
Jean-Sebastien Morisset, Sr. UNIX Administrator <jsmoriss@mvlan.net>
Personal Home Page <http://jsmoriss.mvlan.net/>
Underwater and Travel Photographs <http://www.mvpix.com/>