The Amphibian MKIIa diving apparatus
The half-hour device Amphibian MK II a is a gerslot oxygen rebreather used for special operations, diving in sewers,
shallow water diving and whith motorised submersible canoeing.
The unit is equipped with an over-the-shoulder counterlunglung which makes breathing extremely comfortable. The unit has a constant oxygen supply of 2 litres per minute, which can be bypassed with the bypass valve as soon as the diver needs more oxygen. The 0.8 litre oxygen cylinder with 120 bar pressure contains about 100 litres of oxygen. A flow of 2 litres per minute can theoretically allow 50 minutes of diving, but the unit is qualified as a half-hour unit. A special feature is that the pressure gauge on the regulator rejects the diver’s view. There is a cap on the manometer where there is a mirror on the inside. The manometer can be read with the help of the mirror. The cannister filled with 0.9 litres of Protosorb will bind CO2 during use. The pendulum corrugated hose is the hose through which the diver inhales and exhales. The entire device is mounted on a canvas carrying vest.
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!