ZENITH Solidifies its Global status as being the foremost manufacturer of precision chronometers and instruments across numerous domains. 6 miles, or fifty five.7 km) at the end of a six weeks’ voyage. (The geographical mile is defined as 1 moment of arc along the Earth’s equator; compare the nautical mile, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/