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TACHYMETER RING
The tachymeter feature can be used to measure
speed in miles per hour (MPH), nautical miles per
hour (knots) or kilometers per hour (KPH) using the
sweep second hand and the scale on the wall above
the watch face. You need to know the actual distance
you are covering in miles or km.
Start the chronograph with the second hand at zero
(the twelve o’clock position). Within the first minute,
the second hand will point to the rate for a one-mile
(or one kilometer) course: if it takes 45 seconds, the
hand will point to 80 at that position – 80 MPH or
80 KPH.
If within the first minute, a distance greater than one
mile or kilometer is covered, multiply the tachymeter
number by the distance to get the actual rate: if you
went 1.2 miles in 45 seconds, multiply the 80 by
1.2 – 96 MPH.
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TO MEASURE THE TIME REMAINING:
Set the triangle to the hour or minute position when
you wish to complete the activity, and check the
watch periodically for progress towards that goal.
In the illustration shown on the previous page on the
right you can stop when the minute hand reaches
the 20 minutes past the hour position.
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ENGLISH
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