How does that work in the F-15E and T-6? Can the backseater go out alone in these airplanes? Conversely, can the backseater eject the frontseater?
In the F-4 the backseater had a 'command selector valve' that when rotated to the 'closed' position would punch the frontseater out first if the backseater pulled the handle. If the valve was vertical the backseater went alone.
A lot of backseaters got their feelings hurt if the frontseater wanted the selector to in the 'backseater goes it alone' position, but it never bothered me. All I asked was that the nosegunner choose one position for the entire flight.
I adopted this policy after a pilot told me to 'open the selector for takeoff, close the selector for cruise, open the selector for the low level, close the handle in the bombing pattern, open the handle on initial'.