Originally Posted by
NRU74
Not quite sure why but In those days, 1962, our navigation ceased at the entry point some 15 miles from base when we were picked up for an AR7 approach. Our base had no nav aids except the pundit.
PN Remind me (did you mean ACR7) was that azimuth only ?
I think one of the surviving ACR7s was at Topcliffe (until the mid to late 60’s).
ACR7 or Decca 424 as it was known in the civilian world was a 3 cm pencil beam radar suitable for providing half mile SRAs; it had no glidepath element therefore its decision height sorry 'procedure minima' was higher than that used for PARs.
I saw the ACR7 at Topcliffe in 1971 when I was there for summer camp, there was another at Lindholme until late 1972 and as far as I'm aware, only one survives at Lasham airfield however this has got serviceability problems due lack of spares. Talkdownman of these pages is one of the controllers at Lasham.