Thanks, doo.
But what do you mean by "outstation captains fly together"? Do you mean that a flight has two captains simply because one of them needs to get to another airport (and so acts as an F/O)?
And does "supervised line flying" mean that there are two captains: one who's undergoing training and one teaching. Or THREE pilots: one undergoing training, one teaching (sitting behind?) and an F/O?