FO on a multi-crew, twin-turbine aircraft over 12,500 lbs, e.g. a B1900
The Beech 1900 is not a multi-crew aircraft. It can however be flown in a multi-crew OPERATION.
A captain is someone PIC type rated, current and ASSIGNED as captain, by the company, for a SPECIFIC flight.
That means that if I am not assigned as captain for a specific flight, even though I am a captain with my company, I cannot log the flight as PIC time. My colleague will then be the one assigned as captain for that flight and we cannot both log PIC time for the same flight.
CP