The AN/FRD-13 HFDF "Pusher" system is a primarily British system, similar to the AN/FLR-9 and AN/FRD-10 "Classic Bullseye" systems, with a lower profile and frequency/distance range.
The AN/FRD-13 HFDF "Pusher" system is a primarily British system, similar to the AN/FLR-9 and AN/FRD-10 "Classic Bullseye" systems, with a lower profile and frequency/distance range.