Originally Posted by HSaxa
I was on a recent transcon staring out the window and listening to Ch9 when another UA jet came flying by in the opposite direction and a little below us. It looked really close. Of course, I am no expert on this, but maybe someone can tell me ways of knowing when close is too close? Meaning, I know the requirement is 1000ft or something like that, but what does that look like when you're staring out the window?

Comment #1: I doubt anyone is gonna get on the radio and say "Hey, United 532, thanks for parting my %&@&$* hair for me!"
Comment #2: If you can look in the windows of the OTHER plane and read the words "STANRDARD AIRWORTHINESS CERTIFICATE" in the little plastic holder above the boarding door, THAT was what "too close" looked like.
--PP