Hello,
how the omnimeter works is very easily, and can be used as substitute for a broken split prism stadimeter by using the marks in the scopes (At 6x zoom 1 big mark= 1 degree). You simply drag the sliding part and place estimated mast heigth opposite the measured numbers of marks in the scope at high or low power (thus the double scale) and read in the distance scale the resulting distance to target opposite the same mark but in the range scale. The Sine scale on the right allows doing the same with hull length instead of mast heigth, and the sine scale serves for correcting for the shortened hull size when the target is angled.
