Actually not to save submerged isn't some kind of rule you must always obey, but saving while submerged is really increasing the CTD probability so you do it on your own risk there..
A day before yesterday I was approaching Lerwick (did a harbour raid) but suddenly I was desperatly in need to save the game and leave for a moment. It was approximetly 15 km from land and I was going submerged, destroyers were patroling nearby so surfacing would be my last. Anyway I made a save after a while I thought ok let's give it a try and load it. Of course I basically knew what to expect but I guess I was just lucky - there was no CTD and I could carry on my approach to harbour.
The deadly alive adventure continues..
A small depot ship was already waiting for me there and couple of destroyers too which were sunk later. I got pinged by docked DD it was my luck he remained stationary
After a while there came another two DDs but I was safe just inside the Lerwich harbour, they couldn't get me that close to harbour walls and it was still a night so I was safe from air attacks for another few hours also. These two destroyers approached to about 2.5 km and got stationary, most probably they were waiting for me to come out from the docks
Unlucky for them stationary targets are very attractive snack for my torpedoes and they did the job perfectly. Two more destroyers were sunk. There was also docked T class and S class british subs which I had to leave alone due to lack of torps, but I promissed to come back for them
Later I was already leaving the Lerwick when I hit something underwater. The sea wasn't in her calmest state so I though I was hitting a bottom in shallow waters accidently. I couldn't get away till very morning, surfacing would probably got me killed because of coastal artillery batteries nearby and it felt like the sky was getting brighter with every minute.. When the dawn let some light into the water I checked with periscope what the hell is in my way and here it was - an ugly anti-submarine net. With patience and constantly monitoring the net I went beside it untill I found the gap to freedom!
Got to tell you that this was my first succesfull harbour raid so far
