I managed to destroy my sub with a ground strike.
I plotted a course to Kiel, switched to x4096 time compression, lagged due to increase in AI traffic, missed therefore the right time to switch back to a lower time compression, jumped off the coast line into the air (callout told me I was 300 meters high) and then bugged over the city sky for about 1 minute before being destroyed by the severe damage I took from scratching the rooftops of the buildings below.
At first I was like this:
But then I was this:
