The BIG problem is that of "background tracks".....it always sends a shiver up my spine !!!
What a ridiculous system to have working in airspace that is as confined as is the case in the UK.
OK, so the mentor's override equipment was faulty - or didn't work as it should.....but that is not a design fault, however the utilisation of background tracks IS. To my mind, it's this that was the fundamental cause of this Airprox, and is as dangerous as showing SSR only !!
What a BL***Y system !!!!!!!!
