Quote:
Originally Posted by AquaSwing
Was flying from Denver to St. Louis this morning and was looking out the window and below me a United plane zipped on by in the opposite direction. I'm assuming it was 1,000 feet below me.
As a pilot how often did you see other planes zipping around? Did you ever have knowledge that there were other planes near by that you could look for? Ever get to wave at other pilots?
If the plane looked close, then you are probably right that it was a thousand feet below you. We fly odd altitudes going west and even altitudes going east.
You almost always know about planes is close proximity, either because ATC calls out the relevant traffic, or you notice the plane on TCAS. It’s kind of surprising how hard it can be to pick out passing traffic. ATC will often call out opposite direction traffic at distances up to 20 miles. At cruise altitude, the closure rate can be over 1000 mph, so that 20 miles closes up in just over a minute.
At 20 miles, the only chance of picking out the traffic is if they are leaving a contrail. Even a 747 looks microscopic at 20 miles. Also, the controller will call out relative position, e.g. “Traffic at your one o’clock and 20 miles is a United 737.” That relative position is with regard to your flight path. This, if you’re tracking 090 with a 100 kt wind from the south, the nose of your aircraft might be pointed to 115 or 120 degrees and that traffic at “one o’clock” could actually be to the left of the plane’s nose, rather than right of the nose, which is the one o’clock position.
I don’t think I’ve ever been close enough to make out a pilot in the cockpit, though I’ve heard facetious comments to that effect. I remember Approach control calling traffic kind of late for an aircraft going into Newark and the pilot responded “Yeah, we’ve got the Airbus in sight. Looks like they’re having the shrimp scampi today.”