I am currently reading "The Darkness Beckons" by Martin Farr, and there are several references in the book to the Molephone, a device that helps a caver locate which passageway may lead to another caver with Molephone. Can anyone describe this device and how it works? Is it still in use, and is it strictly for dry cavers or can cave divers/wreck divers and other tech. divers use it? If it is available, approx. cost... Thanks! -- Robert rlair00@ig*.pe*.co*
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