BBC website 2 Nov 2011 said:Two diving chambers which helped develop the science of deep sea diving have been saved from the scrapheap by a Hampshire museum. The pair - named "100m" and "690m" - were used by the Royal Navy to test the limits of the human body deep underwater during and after World War II. They have been positioned outside Gosport's recently-opened Diving Museum
The "100m" and "690m" refer to the depth capabilities of the respective chambers. The Diving Museum is run by volunteers from the Historical Diving Society and is located in No.2 Battery, Stokes Bay. It has its own website here and will be open during the next two weekends before closing for the winter.
An audio slide show describing some of the exhibits is available on the BBC website here.