I have made a bit of research
http://www.uboataces.com/radar-warning.shtml says: "Metox however could not differentiate between radar and non-radar signals, neither could it provide the bearing of the source of transmission." and also on a forum
http://www.uboat.net/forums/read.php...,59120,quote=1 "Since no range information was available from the Metox the submarine commander had little choice but to break off battery charging and dive with an uncharged battery."
So it seems that there was neither range, nor bearing. Thus it would be nice to remove the radar warning contact lines if it is possible.
???