Work in the portions of the tubes related to the launching of nuclear missiles. There are 16 tubes over 12 meters high which vertically traverse the interior of the submarine on several floors. Here we see the access hatch of tube n° 13.

FRANCE. Cherbourg. May 10-20, 2010. Tests of the new ballistic nuclear missile-carrying submarine (SSBN) Le Terrible. The boat is still under the responsibility of the DCNS before being delivered to the French Navy later in the year.
A view of the missiles. A total of 16 nuclear missiles installed in tubes 12 meters high.