The Historical Diving Society of Sweden, Svenska Dykerihistoriska Förening (SDF), is worlds oldest such society. It was founded in 1979. It managed to get hold of a building called the Dive Tank House, “Dyktankhus”, that was used as a training and research station in the Kalärvarvet submarine fleet base. In the building there was a dive tank for submarine escape training. There was also a hyperbaric chamber for research purposes and a steam generator. Hot steam was used to maintain the operation readiness of submarines. Today the building houses a museum of diving history maintained by SDF.
A number of photographs from Dyktankhuset can be viewed below. The place is worth a visit but you are encouraged to check the opening times in advance. This museum is in the immediate vicinity of the Wasa museum.