Carl,
The DGS guys I have worked with have all been fNWA or fDAL line pilots and the training was very good. I too would prefer line pilot instructors because of the continuity between line and school house operations and more pilot jobs. Of course the other side of the coin is if we had line pilot instructors we might not need all those standards pilots showing us how they really do it on the line
And since we don't technically have any standard operating procedure why don't they call them technique pilots?
