To reach the objective, which was over 3000 kilometers away, the two S.75 GAs—with civil registration I-BUBA and I-TAMO, but renominated with serial numbers MM.60539 and MM.60543, respectively, for military use—were laden heavily with 11,000 kilograms (24,250 pounds) of fuel, and modified by fitting a "Jozza" bomb-aiming system and a bomb bay capable of carrying 1,200 kilograms (2,650 pounds) of bombs.