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SETTING THE CASE ROTATING TOP RING
(TIME ZONE III)
The 3rd time zone is set by using the existing setting of
the 4th center hand and adjusting the case rotating top
ring to the desired time of the 3rd time zone. (Please note:
this scale is a 24-hour format). The top ring has 72 posi-
tions. To advance the top ring one hour you will advance
it three positions (3 “clicks”). Note the current time in the
location you wish to track as the 3rd time zone. Rotate
the case top ring counter clockwise to position the cor-
rect hour marker for that time with the 4th center hand.
TACHYMETER FUNCTION
(not all models)
The tachymeter will only determine speeds greater than
60 units per hour using this method; slower speeds can
be measured by decreasing the unit of measurement.
The function performed by a tachymeter is independent
of the unit of distance (e.g. statute miles, nautical miles,
kilometers, meters etc.) as long as the same unit of length
is used for all calculations.
1. Determine the start and finish markers for your
pre-determined distance.
2. Start the chronograph once the target for speed
measurement passes the start marker.
3. Stop the chronograph once the target for speed
measurement passes the finish marker.
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