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In page Timeline of diving technology:

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  • Fernez-Le Prieur self-contained underwater breathing apparatus was demonstrated to the public in Paris,[18] and adopted by the French Navy.[citation needed]
  • Dräger introduced a rescue breathing apparatus that the wearer could swim with. Previous devices served only for submarine escape and were designed to provide buoyancy so that the wearer was lifted to the surface without effort, the diving set had weights, which made it possible to dive for search and rescue after an accident.[citation needed]