Definitely not true in relation to time keeping. Navigation and surveying both relied on accurate and consistent time keeping. Accurate time is required to know precisely where you are. 1300s for clocktowers in most towns 1600s for accurate pendulum clocks 1816s mass production.
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Joel, I hear ya. The fundamental reason for that rail roads to be so accurate, to the second in time was to avert rail road crashes. Prior 100s died by mistiming and bad time zone agreements.
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It was also for accurate geo-location, particularly on ships.
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