Originally Posted by golfyankeesierra
Question for controllers: when I visited an approach-control facility once I noticed on the radar screens that any time a pilot keyed his mike there was a selectable option of cross bearings on the screen indicating the position of the plane with the keyed mike .......
I've used such a system in the past, but it wasn't available to the Tower controller. The single bearing from the direction finder (D/F) could also be overlaid on the approach radar screen. Especially useful before we had SSR, and for non-transponder equipped aircraft. Unfortunately a number of UK civil ATSUs no longer have D/F.
(Not to be confused with the UK Auto-Triangulation system available on 121.5)