Just as other ships may, submarines may also move out of a sea zone where they begin their turn with enemy ships, even destroyers. The destroyer doesn’t stop the sub’s movement, as the sub didn’t enter the sea zone - it started off there.
with 24 compartments and the most important thing: each compartment has already precut and FITTED panels. These are not like plano because these don’t jump out or get dislodged. I got them at Harbor freight tools for $4.99 each.