now that I can actually see the contacts on the map(didn't notice before) I can measure distance pretty easily, just drag my ruler from my boat to the contacts.
I can also measure speed,I mark the front of the contact, time for 3.15 and then mark again. measure the distance between the two marks and boom.. so now I have speed and distance.
now for AOB. this is the one I ALWAYS!!! mess up on.. what I was taught was to take my protracter and draw a line into the contact, through it to the rear, then go directly to my boats front.
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