Tachometric Scale - Girard-Perregaux Watch Manual De Usuario

Warning: After making any setting, always return the crown to its original position against the
case, in position 0), to preserve the water resistance of your watch and prevent any damage to
the mechanism. To do so, refer to chapter "Crown."
Winter time / Summer time
The summer time system was adopted by certain countries for energy saving purposes. It consists
of adding one hour to the legal time during the summer months.
INDICATEUR DES HEURES DU MONDE
The Traveller ww.TC watch does not take the summer time change into account, because it is
not adopted by all countries (Japan, China, Taiwan, etc.). So a difference of one hour should be
taken into account during this period.
Carte des 24 fuseaux horaires
Les vingt quatre fuseaux horaires, couvrant chacun 15° de longitude (soit une heure
Map of the 24 time zones
chacun) et ayant le méridien de Greenwich pour origine, sont à la base de la mesure
en Temps Universel (U.T.). Si l'indication de l'heure est fonction du fuseau, celle des
The twenty-four time zones, each covering 15° longitude (i.e. an hour each) and with the
minutes contrairement à l'heure locale est commune quel que soit ce dernier.
Greenwich Meridian as the origin, form the basis for Universal Time measurement (UT). while
the hour indication depends on the time zone, the minute indication, unlike local time, is the same
regardless of the zone.
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TAcHoMETRIc ScALE

Introduction
This function measures an average speed over a given distance.
Reading
Let us take a road with 2 markers A and B set one kilometer (or mile) apart.
Start your chronograph as your car passes marker A, then stop it as it passes marker B.
Then read the average speed in kilometers/hour or miles/hour on the tachometer scale at the tip
of the chronograph center seconds hand.
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Start
20 sec = 180 km/h
40 sec = 90 km/h ...
Start Stop
Stop
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