For example if BA decide next week they need a few captains due to a shortage over the coming months how would they do it
never going to happen but they have hundreds of FO's ready to be upgraded.
Firt officers they have a holding pool which they can pull on of guys from the middle east wanting to come home with thousands of hours.
And no it doesn't work with the CV thing. All that marketing you read and thought was correct is actually a lie.