Sinn 917 GR, Instructions For Use Manual

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Example 1:
each team, naturally, has its own preferences and methods for
stopping the times during time trials. proposal for the time trial shown left: use
the chronograph (stop) function in combination with the backwards counting
bezel. before starting, set 17 on the bezel to 12 o’clock. Start the stopwatch
at the precise point of passing photoelectric sensor a. you can then count
down the time to sensor ab for the driver. on driving through sensor ab, trip
the stopwatch to zero and then restart it immediately. now set 45 on the bezel
to 12 o’clock; you can then let the driver know precisely how much time he
has left until the end of the special stage.
Example 2: to make reading off the time intervals as clear as possible, the rally
Chronograph 917 is equipped with a backwards counting bezel in which the
all-important last few seconds are highlighted in red. Suggestion for the time
trial shown left: before starting, set 9 on the bezel to 12 o’clock. Start the stop-
watch at the precise point of driving over the pressure hose sensor. you can
now read off the precise time remaining to photoelectric sensor a on the bezel
and count this down for the driver. Without stopping the stopwatch, set 27 on
the bezel to 12 o’clock after passing photoelectric sensor a; after passing
sensor b set 12 to 12 o’clock (the second hand reaches the zero mark on the
bezel after 1:12 minutes) and set 46 to 12 o’clock after passing C (the second
hand reaches the zero mark after 106 seconds = 1:46 minutes). you can then
count down the precise amount of time remaining for the driver.