It is a simpler form of the Hawke's own 10X1/2 or 20 X1/2 floating mildot reticule with some windage indicatiors which has never divulged its secret to me.
A.G
The windage lines just give a reference point, it's still up to you to figure out how many dots are required
although on paper it's easy to see how far off POI is from POA.