The Breathing Apparatus that Ferraro conceived in collaboration with Prof. Zannini, has very little in common with the apparatus he used during the war. In the new product, the gas follows a cyclic path rather than a pendulum flow for better CO2 capture. It can operate either by manually activating the by-pass for the inflow of oxygen, as in traditional rebreathers, or completely automatically, so that the diver is left with his hands free. The breathing bag is protected by a strong protective shell; soda-lime is contained in a transparent cartridge, which can therefore be inspected from the outside and does not need to be dismantled. Many of these features have become standard in modern rebreathers.

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