Three FD crew should be the norm...
First Officer looks after navigation, makes required ratio calls, keeps the plog.
Flight Engineer sees to it that said First Officer stays awake to do the necessary.
Captain rests (snoozes).
F/O gets tired, Captain takes over and the F/O rests (snoozes).
F/E gets tired, Captain keeps an eye on the FE panel, and F/E rests (snoozes).
When all three are tired, the aeroplane is landed, which oddly enough, is normally at the scheduled destination.
When all three are fully awake, newspapers are read and Havana's are enjoyed.
Piece of cake.
