This isn't a bad idea - since drift diving, such as is done in rivers, is
often done while towing a safety float when away from the boat.
Unfortunately, the situation in deep salt water is a bit different. I don't
think anyone would want the tether in that case...


> Instead of something complicated what about something simple.
>
> Take the principle of dipping sonar where they dip the head
> into the water
> from a helicopter to ping.
>
> Invert it
>
> So now you take a gps antenna with ground plane and put it
> onto a float.
> I'm assuming this is clear water thats too busy to safely surface?
> A hundred feet of cable put the float on top for almost all
> sport divers
> A few seconds on the right gps will give you a course and distance
> back to the origin.
>
> Wind the cable and float back down or let it stream but it
> should allow you
> to find the way back to the safe area. If you had a full face mask you
> could even
> rig in that radio...
>
> My 2 cents
>
> Dave
>
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