I once raided Quingdao, a harbor inside the yellow sea. I was there to deliver an agent, and after droping him off, i decided to check out the docks.
No subchasers, no DDs, nothing. I approached underwater and I rose periscope around 10pm, to take advantage of darkness.
Fog all around. I could not see a thing! According to the map, I came as close as 1000 meters to the dock and there was nothing to be seen.
Since fog works both ways, I emerged. Radar signals indicated 6 ships, all stationary. Perfect targets. But how could I see them? I slowly came as close as 500 meters and still could not see a thing. Since this is close to arming distance for the torpedoes, it was useless to go any closer.
I though of a way to shoot them, which might work for stationary targets. It is possible to get their bearings from radar, do the math with your own course, and set the torpedo gyroangle with that. When zooming down in the map, a compass appears which helps you trim those angles with finesse. If you are not too far away that could work fine. Of course, you must be lucky to have the ship in a 90 degrees angle in front ot you, because if it is facing you, the smallest angle error will imply a miss.
I did no try that tough, since there was no way to know if I would be spending torpedoes on useless targets as auxiliary subchasers or gunboats or such. So what i did was to wait another day submerged until the fog eventually dissipated and I could raise hell more properly!
