Is this realistic?

[Incubus]

One funny thing about damage in the vanilla version of SHIII is that if your conning tower is destroyed, you can still use your UZO. This is kind of a relief, because it means even if you are beat up badly you can still get firing solutions on your target. However, I have no freaking idea how the UZO can be some indestructible piece of equipment, but the periscope can't.