Thank you all for the nice comments on my video!
@SubConsciuos: No I haven't seen the video where a type XXI rams ships but I would be interested in the link too.
@Coda: I haven't tried it, but it should be possible to make ships travel faster. In the config files you can modify the max_speed and the eng_power (engine).
@Incubus: You can fire torps when midair but they fall down very fast, so it would be very hard to hit a ship from above. Also I'm not sure if the detonator works when above the surface.
Cheers!
Mr. Fleck