In article , TMOliver
writes
60s era air search radars were certainly well able to detect a/c at the
same ranges as current gadgets, although antenna design limited altitude
performance. Operators were certainly trained or experienced to provide a
higher level of "interpretation" than is required today. Certainly,
today's stealthy and semi-stealthy a/c would provide substantial detection
problems, but in some attitudes, A4s were stealthier than you might
imagine.

I seem to remember a rumour during GWI that one of the RNs air defence
ships apparently managed to detect F-117As using some form of '50s long
wave radar.

--
John