"S Ramirez" wrote in message om...
"Ron Natalie" wrote in message
m...

"S Ramirez" wrote in message
news:sZnFb.60969
What is a popup clearance?

An abbreviated IFR plan and the resulting clearance filed directly with
the controller.

Is this the same thing as directly filing an IFR flight plan in air or are
there several types of IFR clearances filed with the controller while in the
air, the popup clearance being one of them?

It's the same thing. Usually the controller doesn't take the entire 15 blocks
or whatever it is of the IFR plan, just the essential information. The alternative
is to pop over to a FSS frequency and air file the plan with them and then open
it like you'd had filed it on the ground (albeit starting at some point in the air).