When I find a convoy, and try to get their speed by using the 15 minutes process (marking position every 5 minutes--dividing total distance by 2, dividing that by 15, and multiplying by 60), I can never follow the SAME contact throughout the process. Often times, the signals overlap--and its hard to find "merchant 1" in the rest of the pack. Anyone else have trouble with this?
thanks for any replies!
