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Message Display

A friend of mine (who doesn't dive) with a very keen interest in
underground communications and lots of electronic expertise suggested the
possibility of a cave-diving communication system. It seems it would have
considerable merit in solo pushes...anyone know of other similar
systems/applications?


  >What I have in mind would provide 2-way communication between a
>diving base and free-swimming divers several kilometres from the
  > base, and would provide communication between the divers for
  >several hundred metres. I believe it might be possible to provide
  >an indicator to show if a diver were moving towards or away from
  >the guideline.
  >As I am not a cave diver, I cannot start on such a project until
  >I understand what would be of use to divers. I can imagine the
  >divers brain-storming the "ultimate" system, when it would be
  >possible to construct a series of project steps to implement a
  >basic demonstration system, which could become increasingly
  >functional, if the basic concept works.

...some stuff cut....

  >Things get trickier when we move to the diver/radio interface.
  >I spent some time looking for underwatermicrophones/speakers and
  > all that I found used a full-face piece which cave divers tell me
  > is totally unacceptable. My initial suggestion to get around this
  >is to use a simple terminal with a limited number of coded messages
  >and an LED display. Any comments on such an approach?
  >Indeed any comments on the viability of the concept from a diver's
  > point of view would be very welcome.

Any comments...anyone interested in helping with development/testing?

Cheers!

Pat Shaw  [dps@mi*.bc*.ca*]

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