Gadget is hoisted to the top of the 100 foot test tower, and the detonators are installed and connected. Final test preparations begin. Meanwhile, Little Boy bomb units, accompanied by the U-235 projectile, are shipped out of San Francisco on the USS Indianapolis for Tinian Island. Lastly, the only full-scale test of the implosion lens system (before Gadget) is conducted. Initial analysis indicates failure. Bethe later corrects mistaken calculations and finds that the measurements are consistent with optimum performance.