We typically use one bottom timer and a watch. If you are particularly 
worried about depth then you can get a watch that will read depth. 
Personally the redundancy for depth is my dive buddy and my knowledge of 
the area. The watch is good as it allows for timing of stops, BT, and 
reference to time of day which is a double check on BT.

Best,
JJ

At 08:02 PM 2/24/00 +0100, Dan Ocklind wrote:
>Hi all,
>
>As far as I have understood, in DIR you have one bottom timer that also
>shows depth plus a watch that need only show time. Why do you need only one
>depth measuring device, but two time keeping devices?
>
>When I come to think of it I only remember the single bottom timer being
>mentioned in the DIR videos, but on Tod Leonards web site and in the
>equipment requirements for GUE students two time keeping devices are
>mentioned - what is actually the correct DIR procedure on this?
>
>Regards,
>
>Dan
>
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Jarrod Jablonski

President-
Global Underwater Explorers www.gue.com
CEO Extreme Exposure www.extreme-exposure.com
VP Halcyon Manufacturing www.halcyon.net, www.browniedive.com, www.tankfill.com

Global Underwater Explorers www.gue.com
GUE is a non-profit educational, research, and exploratory organization 
with hundreds of dedicated members around the world.

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Extreme Exposure and Halcyon manufacturing produce some of the scuba 
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diving's most active explorers.



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