The diver is connected by a tether line to a tender, with a backup diver suited
up and ready to go 
if there is a problem.  Usually solo, but this changes depending on the dive
objective.  As for 
signalling, we use hardwire comms in addition to line pull signals on the
tether.

The point is not the disadvantages of helmets, but rather that there is no
advantage (reason) to 
wearing them.  If you put yourself in a scenario where you can hit your head on
something with 
enough force to cause injury, something is wrong.  The solution is not to make
impacts less severe, 
but rather to prevent them in the first place.  In the CCG, only the ocean
rescue swimmers wear 
protective helmets, justified by the environment they work in, which may be a
heavy surf rescue 
among rocks.

-Sean  (100% injury free)



On Wed, 7 Jan 1998 22:57:14 -0000, Paul Harris wrote:

>Sean says:-
>>As for helmet mounted lights, there are circumstances where these are the
>most appropriate tool,
>>such as working dives with commercial equipment as mentioned above, or for
>search and rescue.
>
>
>Is it fair to say that this type of diving is essentially solo with surface
>support?
>This presumably means that 3 of the disadvantages mentioned - can't signal,
>blinding buddy and may snag when handing off long hose - would not apply.
>
>r.
>Paul


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