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In page Timeline of diving technology:
"
- Auguste Piccard sent the first bathyscaphe, FNRS-2, on unmanned dives.[7]
- Siebe Gorman and/or Heinke started making Cousteau-type aqualungs in England. Siebe Gorman made those first patented aqualungs at Chessington from 1948 to 1960, popularly known as tadpole sets.[8] Siebe Gorman and the Royal Navy expected aqualungs to be used with weighted boots for bottom-walking for light commercial diving: see Aqua-lung#"Tadpoles".[citation needed]
- Ted Eldred in Australia started developing the first open-circuit single-hose scuba set known: see Porpoise (make of scuba gear).[citation needed]
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