normaly with "v" or "Strg + v" the oow will tell you the bearing and range to the nearest target. Put this on your nav-chart. Do it some minutes later again, and you can see the course on your chart and you can compute the speed. Take 6 min and you have the ten's part of the distance the ship will travel in an houre.
The only thing you have to do now is to compute the km in nm.
Hope I could help you.
Greets Indy
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