My understanding is that modern aircraft measure the fuel volume and temperature and then calculate the weight. Is this right?
The issue is that one can fuel up most jet aircraft with different fuels. And no where on our refueling panel can we select which type of fuel is being uplifted. Jet A, A1, B, JP4 etc. How does the aircraft know which one is in the tank?
Anyway, I'm seriously confused about this matter. I just want clarification so as not to get caught out.