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Originally Posted by donw
In other words...if your target is directly ahead of you...going the same direction...how do you get their speed?
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There is no way to calculate speed with the slideruler from this position, but you can estimate. If its not getting bigger or smaller you travel approximately the same speed.
I was always wondering what speed I should feed in the TDC in this situation, because the realative speed is zero in case both have the same speed.
Of course I know its not a good position to aim at the stern of a ship and launch a torpedo.