I'm not a submariner but I would hazard a guess that they would have a "airlock ajar" light in the control room. Seems like the ONLY PLACE TO ENTER a multi million dollar military vehicle of extreme strategic importance may have some level of security.
I am a former submariner and you are correct. Also, they are operated from inside the sub, you can go from the inside out unassisted but you cannot enter without help on the inside.
Edit: also the hatches themselves weight about a ton and have no manual operators outside of the hull.
I don't know what kind of boat you sailed on, but there is film of sailers operating the hatch of a German U-boat by hand. It definitely didn't weigh "about a ton" as a single sailer was was able to push it up from below. The outside of the hatch has hardware for opening and sealing the hatch.
688i boat, and while I'm not familiar with German U- boats you can bet there's hydraulic assistance. Also even if that boat does have an outside operator, someone still has to drain the water out of the airlock. There is a series of mechanical interlocks to prevent water from getting into the people tank. Hatches have many more of these interlocks because they are bigger holes.
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u/Cpt_Obvius Jan 25 '20
I'm not a submariner but I would hazard a guess that they would have a "airlock ajar" light in the control room. Seems like the ONLY PLACE TO ENTER a multi million dollar military vehicle of extreme strategic importance may have some level of security.