The AIM9 in the FRS1 could be bore-sighted, slaved to the Blue Fox radar or used in "super scan". This last mode allowed the missile to search a box +/- a few degrees of the nose and + quite a lot of degrees (can't remember how many) above LFD, every few seconds. This effectively allowed it to lock a target that you couldn't get the nose onto. Only trouble was that the software was cobbled together v quickly and it was roll stabilised. This meant that in a hard starboard turn, the missile scanned out of your left ear!
Hey-Ho!