And to the OP, to be honest I've never shot a LOC BC approach. Don't even know how to do one... well I mean I know that basic theory of it, but I don't even know if the avionics in the plane I fly will recognize the back course or if I just have to know that it is reverse sensing. I remember seeing BC with a light next to it on the face of the VOR in the old 152 I got my private in.