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Date: Fri, 09 Mar 2001 05:35:03 -0800
To: "Manos Manoli" <cytech@ma*.co*.cy*>, Tech Diver <techdiver@aquanaut.com>
From: Kevin Connell <kevin@co*.ne*>
Subject: Re: support
At 08:27 AM 3/9/2001 +0200, Manos Manoli wrote:
>There are also some questions concerning DIR boating and
>DIR dive organisation for deep dives  i wanted to ask?
>
>a) What are the variables  that define if the deco stages will be
>carried by the divers or stay on the line at an ocean dive ?
>( i personally feel quite uncomfortable not to have at least the O2 on
>me ).

There are some differences in opinion here.  We use 50/50 up to a certain 
depth, then 50/50 and o2, then 35% and o2 then 190 gas, 35%, and o2


>b) Should a backup set of deco tanks be left on board and fetched by the
>
>support divers if ended or secured on the line at the appropriate depth
>just in case ?

Absolutely.  We have the safety diver(s) carry the deepest deco gas on the 
first trip, and then when we get to 20, they get the o2.



>c) Does a support diver have any responsibilities other than monitor the
>dive plan ,
>    watch gas switching , and communicate with surface ? Is it a good
>idea to have
>    underwater communication device between support diver and surface ?

Communication with the topside is the first priority.   wetnotes work just 
fine underwater.


>d) Is a full face availability on 6m a must on realy deep dives ?

No


>e) In case the team is unintentionally drifting is there usually a
>support diver
>     on chase boat  that will quickly qear up and jump into the water to
>assist ?

Well, we always intentionally drift.  but if there are two teams, and the 
teams are separated, then that is *exactly* why one safety per diver (and 
one boat) is ultimately the safest way to go.

Check out http://www.scret.org/safetysop.asp

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