Loading luggage, passengers and CoG
Does the flight crew know where the centre of gravity is just before departure? Is that trust in the loading crew? Or does the aircraft indicate the CoG, maybe using weights from the nose wheel and main gear?
I know the FMC indicates the trim setting based on fuel and loads of other factors. That trim setting would be pretty accurate, you'd hope.
Would it just be unlucky is the CoG was far back, and that wouldn't effect performance, as you can fix it by moving fuel around?
Could it become an issue?