Jack, those "Pterawhatever" guys were out of Ban Me Thuot, I think maybe 119th Recon Co., oddly enough. The O-1 guys on our runway were 219th Recon Co., I'm almost positive "Headhunters."
"Sighter" maybe AF FACs? I forget.
Now "Crown" I remember: "Beeper Beeper Come up Voice. This is Crown Four On Guard..." Brrr.
Bob