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At the Navy, Norden worked on a catapult system for a proposed flying bomb that was never fully developed, but this work introduced various Navy personnel to Norden's expertise with gyro stabilization. In 1911, Norden joined Sperry Gyroscope to work on ship gyrostabilizers, and then moved to work directly for the U.S. The Norden sight was designed by Carl Norden, a Dutch engineer educated in Switzerland who emigrated to the U.S.
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This precision would enable direct attacks on ships, factories, and other point targets. During prewar testing the Norden demonstrated a circular error probable (CEP) of 75 feet (23 m), an astonishing performance for that period.
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Together, these features promised unprecedented accuracy for daytime bombing from high altitudes. The Norden further improved on older designs by using an analog computer that continuously recalculated the bomb's impact point based on changing flight conditions, and an autopilot that reacted quickly and accurately to changes in the wind or other effects.
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It was an early tachometric design that directly measured the aircraft's ground speed and direction, which older bombsights could only estimate with lengthy manual procedures. Army service, is a bombsight that was used by the United States Army Air Forces (USAAF) and the United States Navy during World War II, and the United States Air Force in the Korean and the Vietnam Wars. Enola Gay bombardier Thomas Ferebee with the Norden bombsight on Tinian after the dropping of Little Boy