Torpedoing moving ships

[Woke Up Dead]

Originally Posted by neoasel

DT video:
http://youtu.be/dKFbIFu4v6o

Nicely explained, but torpedoes were dropped too close. The whole point of Kommandogerat is to be able to drop torpedoes from larger and safe distances and to be precise - score hits:
http://youtu.be/fBTIQ9gHoxw

Thanks. The Italian one is a bit different, not as automated. With either one, you still need to know how to approximate the speed of the ship, how do you do that?