Aro Ar57b – In 1957, the new oxygen rebreather was presented by Cressi Sub in Italy and immediately adopted by the Italian armed forces, by fire-fighters and by diving schools. It was the simplest, most reliable and safe oxygen device on the market, and is still being used by some armed forces.
Therebreathersite was founded by Jan Willem Bech in 1999. After a diving career of many years, he decided to start technical diving in 1999. He immediately noticed that at that time there was almost no website that contained the history of closed breathing systems. The start for the website led to a huge collection that offered about 1,300 pages of information until 2019. In 2019, a fresh start was made with the website now freely available online for everyone. Therebreathersite is a source of information for divers, researchers, technicians and students. I hope you enjoy browsing the content!