Hmm... I've just finished my first patrol in new campaign (starting in september 39)
I was assigned to patrol AM23 so after about 1,5 day of clear sky and no ships I decided to check AM02, AM52 and AM53. Good wether but not much luck there. Just one tug boat sunk with deck gun.
Next day I was still patroling AM52 and suddenly go a convoy report (?!?) I could not believe - convoy so early? (it was 13th september). I did all the calculation and itercepted it. Still with not much luck - just one C2 sunk and one Victory ship slightly damaged. I noticed a Fiji in convoy. I hit it with torpedo and it almost sunk. It catched fire and almost layed on the sterboard. I thought that it will sunk in few minutes. Nothing happened
I made second approach in the middle of the night. Submerged but was not silent enough and one of the escorts spoted me. I managed to sunk just another C2. And then.. escort started pinging me. I was surprised - first time ASDIC so early in war. I had hard time with 2 destroyers. My boat was damaged, some flooding in aft. torpedo room. I managed to stoop flooding and repair the boat. For next few hours I was hunted with ASDIC... many deptcharges but luckily no more hits. After this, aft. torpedo room stayed red (even after repairs) in crew/damage screen.
I thought.. I'm lucky.. I guess my hull integrity is very low now. I have to be carefull (I was at 120m in my VIIB when hit with wasserbomben). After few hours i escaped and started preparation for 3rd approach (still 4 torpedos left). Dangerous waters... not to deep but I decided to try to try to kill this Fiji. I overtook the convoy, spoted some tug boat, then fishing boat. Sunk them with deck gun (fishing boat with just 3 shells!). But suddenly an aircraft appeared.. I crash dived but took damage.. Flooding in forward sleeping section. Managed to stop it.
I made 2 more attempts to intercept a convoy. In one I fired 3 torpedos. 2 to Victory ship - no kill, she seemed she did not noticed I hit her ;-) I turned the boat and fired torpedo T1(magnetic to C2). Missed bit it hit C2 in next column (i guess my contact report to BDU about the convoy at 10knots was not accurate - they were doing about 6 knots) ;-) Again no kill, just catched fire.
Then I intercepted the convoy again with only 1 torpedo left. Fired the torpedo.. (T1) but.. a dud or something? Low gyro angle, correct depth, impact pisto but.. missed? anyway i heard some explosion about half minute after it should hit a fiji (torpedo hit the bottom of the sea?). Weird thing was that Fiji seemed to be completely repaired. No fire, no inclination.
Anyway. I took a course to homebase. No surprises, calm comeback to Wilhelmshaven.
The most weird thing was a patrol report - it told me i had 100% of hull integrity!!! how could it be? I was depthcharged by destroyers, my after torpedo room was red for the rest of the mission, then hit by a plane and no damages to the hull? I thought my boat is so damaged It won't go to next patrol before Christmas.
Anyway - I was promoted to Oberleutnant zur See

Finally.. I was not feeling comfortable when 3 of 5 officers were Oberleutnants ;-) but recruited two of them anyway before first patrol because of their skills.
I'm using 1.4b with rub1.43+patch1.43+berrywater1.44
--U-Boat Patrol History-----------------------------------------------
01. 03SEP39 - 21SEP39 (19 DAYS)
Ships sunk: 7 (7 Merchant, 0 Warship)
Tonnage: 20811 (20811 Merchant, 0 Warship)
BTW: is it possible to do a mod which will give some renown for damaged ships? I'm reading Blair's "Hitler's u-boat war" and I noticed that commanders were credited for sinking 'half' of ship when for example one of them damaged it and second finished.