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 Posted: Sun Nov 5th, 2006 07:44 am
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James Haury
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 When a watch has numbers on the bezel to use in figuring out your speed how do you figure it out?
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 Posted: Sun Nov 5th, 2006 07:56 am
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ambience360
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 Tachymeter / Tachometer
The tachymeter is the miles per hour indicator along the outer edge of the watch face. It is meant to be used in conjunction with the chronograph feature to measure speed over a distance of one mile (or kilometer).
  1. Begin with timer hands at zero.
  2. Start the chronograph when the object in motion moves from the starting point.
  3. Stop the chronograph when the object in motion has traveled one mile.
  4. The seconds hand chronograph timer (the large seconds hand) will have advanced to a point on the tachymeter. The corresponding number indicated by the tachymeter is the average speed (in MPH) the object has traveled over the mile distance.
Note: The object must have traveled exactly one mile for the tachymeter to be accurate. Sometimes kilometers per hour (km/h) are used instead of miles, it's marked on the starting point of the scale normally.
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 Posted: Sun Nov 5th, 2006 01:22 pm
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pacifichrono
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 A tachymeter can be used to measure other activities, too.  For example, if you run a factory and time a worker assembling one part in X seconds, the tachymeter will tell you how many parts that worker could assemble in one hour.
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 Posted: Sun Nov 5th, 2006 08:32 pm
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James Haury
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 To ambience 360 and pacific chrono .Thank you very much ,Thank you.snoopy1.gif
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 Posted: Tue Nov 7th, 2006 04:21 am
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yamahaki
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 I use them to get average lap times.
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