Quote:
Originally Posted by Pisces
I'd still like to see a drawing to go with this, if you please. Since I don't understand how or why that line at 2000 yards is plotted. You state it is perpendicular to own course. Are you sure it's not supposed to be perpendicular to the bearing of 340? Or is it perpendicular to own course because the bearing is set to 0 in the TDC when you set the AOB to 90. Well, I'm probably just having trouble understanding because I'm tired as a dog.
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Think of it as drawing the target's track, where your distance to track is 2,000 yards and you are on a normal course (your course is at right angles to the assumed target course in the direction to close the distance to track). You plot the points where the target's bearing intersects the (theorhetical) target's track, so you only need to worry about the bearing and not the range.
I don't believe it will work though in every case though, as the rate of bearing change won't be constant as it will change with the range, as the target is moving in a straight line (hence the TMA methods working), whereas with astronomy it's bearing movement due to rotation, which is going to be fairly constant.