the first 4 segments ( segment 1 is the bow including 4 holes for 4 Torpedos with hatches ), segment 2 is torpedo storage and loading, including a big hatch in the roof to load them into the Sub, Segment 3 is crew beds and Segment 4 toilets, pipes and some system controls + vents

you might see some "holes" and spaces between hull and interrior, there would be the support structure for Hull, but to see more of the inside, its out of the way

builded and rendered in Stud IO