PIC is in command, not in control. In plenty of short-haul flights, the FO can be PF, but they aren't competent to be PIC. See also <https://aviation.stackexch

PIC is in command, not in control. In plenty of short-haul flights, the FO can be PF, but they aren't competent to be PIC. See also <https://aviation.stackexchange.com/questions/33414/who-is-the-pilot-in-command-when-the-pilot-in-command-is-resting/33462> https://aviation.stackexchange.com/questions/33414/who-is-th.... As in the AF447 case, the PIC will delegate to an acting PIC while they are on their rest break, but ultimate responsibility still remains with them.