I agree it was a little strange about the sub being so deep in so short a time. Not sure the water would be that deep so close to land but then I remembered what a friend of mine said about SCUBA diving. Going down you can hold your nose and blow out your ears to equalize but coming up you have to go slower and wait for your body to equalize.
I don't think a sub would work quite the same way but maybe whoever wrote the scene did.
I don't think a sub would work quite the same way but maybe whoever wrote the scene did.