45
44
En
gl
is
h
Measurement scales
Specific sections/general information
3
Using the telemetric scale
Example: calculate the distance between
your position and an event producing
light and sound simultaneously (e.g.
a storm).
The chronograph is set off by the detec-
tion of light, for example a lightning
strike. Then it stops on detection of the
sound, the clap of thunder. Here, the
storm is 9.9 km away.
TÉLÉMÈTRE 1Km
2
3
4
5
1
5
16
17
1
8
19
1
4
1
3
1 2
1 1 10 9
8
7
6
Reading the chronograph minute counter
(Seamaster Diver 300M, ETNZ 2015)
Example: counting down the time before
the start of a regatta.
3H counter:
The inside timer displays the minutes of
the chronograph using the white part
of the Regatta needle.
The outside timer displays the 5-minute
countdown before the start of the regatta.
The chronograph is started at the first
horn blast, 5 minutes before the start of
the regatta, to allow the yachtsman to
position his boat closer to the starting
line.
Measurement scales
Specific sections/general information
3
Reading the chronograph minute counter
(Seamaster Diver 300M, 36th America's Cup)
Example: counting down the time before
the start of a regatta.
3H counter:
The counter has a minute hand and
an hour window. The white part of the
indicator represents the 10-minute
countdown to the start of the regatta.
The pre-regatta phase is divided into 2
parts, the first 5 minutes are allocated
to preparing the boat and crew and the
other 5 minutes to the positioning of the
boat.
The chronograph is started at the first
signal, 10 minutes before the start of
the regatta.
