Harbor attacks and comatose officers

[Tasuric]

Heya folks, I’ve been enjoying the fine game for only a few days now, trying to get the hang of things before I up the realism. I’m currently sailing the biggest boat one can get at the start of the war, I’m on my second patrol. Sank three small merchant on my way, went past scapa flow, patrolled my area and found jack all for several days, and couldn’t find anything to shoot due to bad weather and heavy fog.
With my senior officers slowly dying at their post (damn the fact I can only recharge 2 at a time) I decided to head back, down past scapa flow and figured.. what the hell, I still have a bunch of torpedoes, and with this weather there should be a bunch of ships in the harbor over here (not scapa, heard stories about that one).
So I crept into the harbor and found a C2 tanker and a small merchant, blew both to hell without being shot at by anything, the SO reported a warship closing, then going away again..


Now my question is, why do people say harbor attacks are risky? I realize it’s early in the war and my realism is set at stock, but how can a destroyer ever get to me if I’m parked stern first into a dock perfectly suited for a submerged uboat? They can’t sail over me to drop DC’s, or shoot me cause I’m submerged, couldn’t one outwait destroyers till they lose interest or crash into the dock walls?


Also, I’m having issues keeping my senior officers fit, I can only recharge two at a time, and it never seems to be enough, on longer patrols they always head into the red.