Indianapolis departed San Francisco's Hunters Point Naval Shipyard with its valuable cargo on 16 July 1945, within hours of the Trinity test. She set a speed record of ​74 1⁄2 hours[18] from San Francisco to Pearl Harbor, an average speed of 29 kn (54 km/h; 33 mph). Arriving at Pearl Harbor on 19 July,[19] she raced on unaccompanied,[20] delivering the atomic bomb components to Tinian on 26 July.[21]