Veteran Australian cave diver Ken Smith has been cave diving for over 25 years and has dived caves in most areas of Australia: the Lower South East, Nullarbor, Jenolan, Murrindal, Junee Florentine, and the Kimberley. Ken has also traveled overseas to Florida, the Yucatan in Mexico, and Germany. He rates his best cave dives occurred on a recent trip to the island of Abaco in the Bahamas.

Affectionately known as "Mr Pinger", Ken's low frequency radio transmitters used in cave mapping have included him on many cave diving expeditions, including the mapping of the third sump in Cocklebiddy Cave on the Nullarbor.

In this interview Ken talks with Greg Bulling of his cave diving exploits and explains how the development of his "pinger" technology was a turning point in his cave diving career.

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Ken Smith cradling his "pingers" in Engelbrechts Cave | Photo: Dr Richard (Harry) Harris