Quote:
Where the window in the conning tower are is a free flood area, i.e. open to sea
pressure. In other words it is not part of the pressure hull. You would need scuba
gear on to be able to look out the windows when under water.
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very true
This was designed to allow the helmsman to drive the submarine on surface like a normal vessel, with full visibility for maneuvering but protected from the heavy weather.