In Career Mode, Sub Sink From Going From 60f To 200f
 

Was In Career Mode In China Sea , Getting Attack By Destoryer.
I Went From 60ft To 200ft. Started To Have All Problems Floodong,
Other Part Of Sub Break Down.
Anyone Have His Problem Also.

Could be a number of things. Were you shot at/damaged before your submerged? If so - damage to the bulkheads could have occured when you went deep. Second - if your attacked - damage could be occuring if the DD dropped on you and was accurate. That is his job after all :yep: - seriously - the damage model is under investigation - but I would expect you had some damage either earlier in your campaign that you "repaired" but gave way - or you were damaged when you submerged.

Good Hunting.
Captain Haplo

By the sound of it, your sub's hull was seriously damaged by earlier damage and was crushed at that depth. Which is why you want to be very careful about diving a damaged sub deep.