Hmm. On this occasion, SAM is not talking complete rubbish. I can't vouch for the assumptions about what equipment has been supplied, but the physics of the radar systems of that age are probably about right. Just this once, assume that SAM knows something about SAM Radar.
And his point about radar reflections from closed u/c doos carries weight too.
Hate to be a party pooper. Am I going to get stoned now? And I don't mean in a nice way.