Every kilogram has an address. Weight, arm, moment — proven.

The method is moments. Calibrated load cells seat at the aircraft's defined jacking points — or low-profile platforms roll under each wheel — and read the reactions. Each reaction times its arm from the datum is a moment; the moments resolve into longitudinal and lateral CG; and the report joins the tail's weight-and-balance history, where every future loading calculation will stand on it.

The discipline makes the number. Level — attitude set against the datum with digital inclinometers, because an unlevel aircraft feeds cosine and moment errors into both axes. Still — doors closed, air handling calmed, because wind over a tailplane generates lift and lift reads as fake kilograms. Accounted — fluid states declared per the schedule and the equipment inventory recorded, because an undeclared hundred litres moves the answer by exactly what it weighs, at whatever arm it happens to sit.

And the same arithmetic scales down to a cradle. For individual articles — stores, pods, assemblies — a CG-measurement fixture stands on multiple calibrated cells and resolves the article's weight and CG in one setup, with handling systems that present it safely and repeatably. That component class is precisely what this page's quoted requirement describes.