Much More precisely, “if not produced from the workshop, almost everything was made inside an hour’s travel from Stamford”. 6 miles, or 55.seven km) at the conclusion of a six months’ voyage. (The geographical mile is described as 1 minute of arc along the Earth’s equator; Examine the nautical mile, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/