[Klaus_Doldinger]

Thank you all.

Finally I think that I have the basic ideas for a correct use of the TDC. I said it was useless because at certain angles and ranges it gives you absurd data, like 35 knots for a merchant. I suppose I forgot that if your estimations about range and AOB are not correct (specially at long range), TDC can not only give you a wrong speed, but also a totally incredible one. So I must conclude that TDC is a useful device as long as you are able to use it properly, I mean, if you are able to feed it with more or less correct information, and this is easier at short range and at wider observation angles, where errors are less probable or if any, less important. My problem was that I supposed that TDC should be capable of giving me a valid speed with a reasonable error margin almost at any distance within torpedo range, say 5.000 meters.

In any case, I believe that I was a bit lucky in the attack I have related; although I fired at 90º and 75º AOB and at 000, 1.500 meters is rather a long distance. I believe that before the war Onkel Karl recommended not to fire a torpedo at less than 800m

One more thing: I found very useful the scalimeter to have an idea of the convoy speed at long distance, at 90º or 270º. Once identified a ship, I measured the time it spent crossing the crosshairs, and gave me a result of 8 knots, which is a very approximate estimation for long distance. Also, putting the scalimeter in the bow of a ship and observing that he didn´t cross the crosshairs at 90º, I calculated that the convoy had actually almost my own speed.

I need more practice to measure time and distances with the scalimeter in order to fire a torpedos, and will keep in mind the use of CTRL and SHIFT.

Thank you all for your comments and suggestions, this thread has been one more step in realism for me!

Aaronblood: also I´m learning to use MoBo: excellent and very useful tool for interception. I´ll keep learning his use!