Editing Scuba set (section)

====Cryogenic====
There have been designs for a cryogenic open-circuit scuba which has liquid-air tanks instead of cylinders. Underwater cinematographer Jordan Klein, Sr. of [[Florida]] co-designed such a scuba in 1967,<ref name="Hall of fame" /> called "Mako", and made at least five [[prototype]]s.<ref name="Tzimoulis 1967" />

The Russian ''Kriolang'' (from Greek ''cryo-'' (= "frost" taken to mean "cold") + English "lung") was copied from Jordan Klein's "Mako" cryogenic open-circuit scuba. and were made until at least 1974.<ref name="Bech and Sutton" /> It would have to be filled a short time before use.