Originally Posted by
wiggy
FWIW our EASA'land airline words the relevant section of it's Ops manual in this manner: "A Captain or other suitably qualified pilot may temporarily act as PIC in flight during periods when the designated PIC is taking rest. He/she will remain under the overall authority of the designated PIC." (my emphasis).
so, in your airline, when you act as PIC why you cannot log that flight time as PIC? ... as many airlines do?