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Hose-free diving promised greater mobility and safety for divers in rugged terrain.

The apparatus, developed in 1912, consisted of one cylinder filled with compressed oxygen and a second filled with compressed air. A pressure-reducing valve was used to produce a gas mixture from these, which the diver breathed in. After exhalation, the carbon dioxide was chemically bound and the gas mixture was forced back into the helmet. This diving apparatus enabled depths of up to 40 m to be reached.

Drägerwerk Lübeck, 1913, Inv. No. 72842

Around 1500Leonardo da Vinci, renowned for his innovative ideas, developed the first diving suit.

The diving apparatus in the exhibition...

... and on Deutsches Museum Digital.