For those, who are capable of the german language, this problem is currently addressed here
http://forums-de.ubi.com/eve/forums/...3581002255/p/1
Current state:
The sub has two types of damage:
Static Damage and Dynmaic Damage. Dynamic Damage is displayed within the game and can be repaired. Static damage doesn't show up. You have a stataic damage for the whole sub as mentioned a few posts above - and you have a static damage for every part of your sub, including persons.
This damage show up as DamageHitpointsConsumed in the savegame.
Currently we are writing on a "external" tool, to display the static damage of a sub from a savegame.