What time is it? Watches and horology

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Ordinata in reply to @Dramatic_Hammer

Orly? Shirley the scale is dependant on units?

I mean knots / miles / kilometers are all different ratios no?

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Dramatic_Hammer in reply to @Ordinata

Nah the scale is unitless - you measure time over a known distance in whatever units you want, then it tells you the speed in those same units.
Eg. 1 mile in 30 seconds is 120mph but also 1km in 30 seconds is 120kph, although clearly they’re not the same actual speed.

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