Alfred Loomis pioneered the key navigation technology of LORAN.
One of the most common navigation watches produced, with many used by the U.S. military well into the Cold War era.
This primary atomic frequency standard, a hydrogen maser, served as the stable frequency source for the master clock.
It contained a crystal ocillator and was key to the LORAN system.
A cesium clock like this was tested on the NTS-2 satellite to see if clocks could keep accurate time in space.
This atomic clock was built for the first GPS satellites in the late 1970s.
This Dutch mathematician patented the first working pendulum clock in 1656 and later devised a watch regulator called a balance spring. These inventions changed timekeeping forever.
This chronometer movement was made by John Roger Arnold about 1825.
This chronometer movement was made by Thomas Earnshaw, about 1798.
Box chronometer, after Thomas Mudge, No. 14 made by Howells, Barraud, and Jamison, 1802.