Not sure what you guys are calling the “upper hull” on a submarine. The fleet hulls did have superstructure that was more or less fairwater but that is outside the pressure hull, which is cylindrical. The albacore hulls have nothing flat on the outside except maybe hatch covers. And there are not two parts, either upper or lower , to the pressure hull. Ballast tanks blend in to the cylindrical shape.
Controlling pitch and roll is instrumented in or near the control room and it’s the trim and drain pump guy’s job to keep the thing level. It’s all about not spilling anyone’s coffee , you know?
Thanks for your replies, and Yours too L. P.!
See post 70. I submitted my "Off Center" dead roll question to Lone Palm's "Know your nautical terms". I enjoy the answers and am sometimes rewarded with interesting information and enjoyable recollections for which I thank all of you!
"It’s all about not spilling anyone’s coffee , you know?"
I do! Very important when wires and radar guts are spread out all over the test bench!
(Slide over!)