So is the chronometer (whatever it's called) broken?

[Shrap123]

For the life of me I can't get the speed of my target (only tried the torp training so far) to work.

After setting the target range and bearing I activate the chronometer (stop watch looking thing) and press the top button. No matter how long I wait when I click to stop the CM and click to send it to the targeting computer I get no speed read out.

Am I doing something wrong?

[SharpShin]

Yes it is broken according to the instructions given by the manual. It doesn't calculate the speed for anybody. You can still do it manually, there are a few threads about it around here somewhere.