Originally Posted by
Check Airman
To be nitpicking, mass is the correct term, but the chart says weight...
Indeed so: Mass denotes how much matter an object has whereas weight is a measure of how strongly gravity pulls on that matter. If we were to fly our 777 to the moon (ha ha, but anyway) then the weight would decrease as the effect of gravity would reduce whereas the mass (the amount of matter that the a/c is comprised of) would remain the same (fuel burn aside).