Dave S wrote:



If you get a popup clearance from ATC.. the controller/specialist is
entering your information into the computer, and requires much if not
all the same information as if you filed on the phone.

Call sign, type/identifier, /whatever .. souls on board, etc. Point of
origin tends to be where you are at, even if airborne.

ATC does not care about alternates, souls on board, fuel on board, etc.
We want equipment suffix, altitude and route. I'll make up a speed as
I type it in.