I trained how to check course of target and it's easy when I know distance to it. You descriped that I should mark his position but how can I do this if I don't know distance ? Example: I found first weak sygnal of target, bearing 26, don't know distance, I mark it on map, I wait 3min, bearing changed to 30, and now how should I know if he is moving north, east or south to put second mark ?
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