Yes we have the double wave. It was created due to the standard wave to OO being received with a blank stare. So you get the other hand going until they acknowledge you. If I am taxiing by a fellow CPZ aircraft, it's my standard. I occasionally need a cold shower when we pass and I get no wave in return.

As for the standard pilot nod, I find that it's returned most of the time. Except ATL...it's 50/50 there. A cold shower follows when I get eye contact and they don't return the nod.

It’s probably because they are leaving you a broke plane that they were to lazy to write up. So any eye contact would make them uncomfortable.

Pilotically correct behavior
 

“Aunt Flappy’s Guide to Pilot Etiquette” prescribes:

Any pilot — head nod
Same company — single wave
Same aircraft type — double wave
Same seat position — two hand wave & one foot waggle
New-hire classmate — assume “deceased insect” posture and flail with all four limbs while emitting loud squeaks.

A less-than-correct wave is a faux pas, while overwaving is considered obsequious. :D

Yes it's with two hands. We call it the windshield wiper wave at CP.

Is it symmetrical though? The CRJ seldom is.

This has to be one of the dumbest threads ever to run on APC.

No, not at all. A quick search will reveal ample threads with far greater drains on the collective intellect.

It’s like when I used to ride a sport bike and tried to do the wave to a Harley rider or worse yet, motorcycle cop. Half of the Harley guys would wave and 0% of the motorcycle cops wave.

.........
 

Here’s the one we used to give the old “pilots defending the profession” when I was at Eagle.


Very fitting greeting.

It is there. You just have to look hard for it, which is of course the intent.

Study the Delta pilots. Intensely. Just stare at them as you walk through the terminal. Don't look away. They are the key.