The BV Scan starts with a once-over on the full grid for Sue de Coq, APE, and BARN formations, which are explained and illustrated on the submenu pages.
Later methods are aided by constructed visual aids, with the templates described on the Tools page. The first of these is the bv map and its derivative, the XYZ map. In the order of battle, XYZ-wings are scanned for first, with regular and irregular AIC enabled XYZ-wings found on the XYZ-map. Then an enumeration of XY-chains is done with the aid of a curve figure, the XY Railway, on the bv map.