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If I recall correctly, the reason that the diver has to keep the line
tight in SAR is so that he can keep himself in a predetermined search
pattern determined by the tenders/supervisors on topside.  This is not
usually the case w/ recreational divers as they are usually swimming
around any which way looking at what intrests them at any particular
moment.  This would leave it to the tenders to keep the line tight in
recreational ice diving.  

Lee 

On Tue, 13 Jan 1998 09:33:49 +0100 Wildeshausen@t-*.de* (Christian
Meyer) writes:
>Glenn,
>
>I wonder about so many signals to be used at ice diving. In SAR
>operation we come along with four basic signals, others are subject to
>divemaster's advice, depending on the SAR situation. The basic 
>signals,
>defined by the National Accident Insurence Authority are:
>
>1 pull - emergency signal
>2 pulls - keep the line on Your left side (for search operation)
>3 pulls - keep the line on Your right side (for search operation)
>4 pulls - end of dive, going up
>
>The point is that the _diver_ has to keep the line tight, that he can
>feel direct contact to the line's man. The line's men can conduct the
>diver in all positions required, even at zero vis. 
>
>OK, may be some point to discuss if the one pull emergency signal is
>missunderstandable (AFAIK the German Navy uses 1 pull for OK and a
>series of quick pulls for emrgency), but an OK signal isn't necessary 
>as
>the diver has to keep the line tight. Anyway, in all cases of 
>emergency
>all prepared algorythms have to be started: pulling in the line, 
>sending
>the relief diver in, a.s.o. That's why there are no different stages 
>of
>emergency to be signalized.
>
>Safe diving,
>Chris
>------------------------------------------------------------------------
>Christian G. Meyer		wildeshausen@t-*.de*
>DLRG Wildeshausen e.V.		(German Lifeguard Ass. 
>Wildeshausen)
>------------------------------------------------------------------------
<snip>
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