World War I
Briggs was detailed by an Executive Order to the Department of Commerce's Bureau of Standards in 1917 due to mobilization pressures of World War I. There he developed an artificial horizon device for naval vessels with John Hayford which established a stable zenith independent of the roll of the vessel for the aiming of naval guns. This allowed for the roll of the ship to be observed, so that the firing of the guns could be timed with the roll of the ship. The device was so successful it found its way into the control rooms of most naval vessels. A confidential report called the Hayford–Briggs report was given to the Navy, but never published.
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