Last of the Navy Base
This is the diving school for the entire military except for the Seals.
Below looks like a sphere but it is really a cylinder. On the bottom is a huge tank and on top there are five compartments where up to 10 divers can live for weeks for saturation diving. In saturation diving divers are brought down to a desired depth (pressure) and kept there for extended periods of time. This permits them to get more work done rather than use so much time compressing and de compressing.
This is the Quarterdeck of the Dive School