Sleeve of wizard, I believe you are correct also.
I have read this in the JAA/EASA regs.
Australian CASA does not state this however.
But after sending 2 emails to CASA Australia, I got 2 separate replies with totally 2 different answers.
One saying, it can be logged PIC, when in the left seat relieving the official PIC, and the other answer saying that there is only 1 PIC on the flight, therefore all time whether in left seat or right seat and being PIC when on duty or not, is to be logged as co-pilot.
So as I see it, the answer varies depending on the CAA you work with and the airline you work for and depending if its Australia or Europe!
As I see it, whether employed as a Relief Captain or Cruise Captain, what ever you want to call it, and in QF's case, they call it a Senior F/O,who has the authority to act as PIC, Then this time can be logged as PIC or Co-Pilot.
What's makes this whole thing confusing is that there is no international standard.
Lets face it, our logbooks were not designed for modern times.
We really should have 2 columns in the book,one PIC and the other Commander.
Anyone else working for QF care to comment?