I have known about these and their use for quite awhile, though never learning much actual detail about them. I have always been really curious how they actually worked.<br><br>Funny I end up leaning about how electromechanical targeting computers on battleships actually function in detail before getting an inkling of detail on these.,(reply>), "I'm gonna look back on the footage for this and realize, that I've just been spinning all this time." - Someone who was, in fact, spinning, the whole time.