Underwater GPS Will Tell You Where Your Boat Is

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We've come to rely on GPS in our cars and boats to find our way around, but not as divers, because GPS radio waves cannot pass through water Think how com-forting it would be if we always knew where we were and how to get back to the boat And especially if the boat crew could track every diver too.

Well, a German company, EvoLogics, says it has got-ten around the problem and has created a new diver's underwater navigation system using three components: a sonar-emitting buoy with a GPS receiver, a tracker unit, and a diver console....

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