Where is my rudder?!?!

[The Bandit]

Well I can see the realism value but I am very dismayed at how they implemented this. I was just attacked buy a destroyer at periscope depth in the USS Drum (I was trying to line up a close shot from my stern tubes) and took very sever damage to my stern torpedo room. It is completely flooded (I thought you autoatically died if a compartment was flooded) and had critical damage done to the bulkhead, the decoy tube and all of the aft tubes. Now here's what pisses me off, my rudder was literally knocked off, I have dive planes back there but NO rudder. After the DD passed me I was able to put two fish into the side of him (he sunk in about 2 minutes) but now that I have surfaced and have begun to repair most of the damage, I find that I cannot change course thanks to my missing rudder. I can understand how they would want to put this in the game but come on, now I can't finish my patrol and I don't think this realistic at all. Even without the rudder it would be possible (if highly inefficient) to steer the boat by differing the RPMs on either prop (sort of like how a tank steers by verying power to each tread, or like how they landed that DHL Airbus A300 that had its ailerons and rudder knocked out by a SAM) and what really bothers me is it is "invisible" damage just like how after being hevily depthcharged you find out your diesels don't work anymore, even though they are in perfect shape, as is my rudder transmission. If they really wanted to include this invisible damage so much they should have at least fiven you an option to scuttle once your boat is crippled.