Originally Posted by
757Driver
This with a however.
If you’re the F/O it would be super polite if you asked the Captain if he wouldn’t mind you using it. I don’t like them but if a co-pilot wants to and asks, knock yourself out.
The pilot in the right seat is a "first officer" not a "co-pilot." At least on the ground. In the air they’re the "pilot flying" or the "pilot monitoring."