Quote:
Originally Posted by commandosolo2009
could you be kind enough to make one for the metric system. And please explain what is bearing change.
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Yards are about 1/10th shorter than a meter. So take the metric distance in meters and add 10% to find the line in the table.
A bearing change is the difference in the viewing direction through the periscope (or TBT, hydrophone sensor, etc.) of 2 moments you point it at the target.
Imagine standing alongside a road with a car approaching from your left. As it comes closer, the direction to it(=bearing) slowly starts to drift to one side of you. Once it passes you, the direction moves at it's quickest. (Be careful not to strain you neck
) As it has passed you, the changing of the view direction slows down again until it is at the horizon. The table assumes you measure this view-direction change while he is passing the moment when the AOB is 90 degrees.