Originally Posted by
Senior Skipper
That does make it interesting. If the designated CA goes on break and decides that one FO will now be acting as PIC, (with the release signed, no less) why would this not count as bona fide PIC time in a subsequent interview?
Because airlines can define PIC any way they dang well please. It's legal to log it, but don't be surprised if it's a topic of great interest in a future interview.
For me, it's as simple as
acting as PIC vs., well, simply being the PIC.