IWC Schaffhausen 3950 Mode D'emploi page 30

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U T C ( U N I V E R S A L T I M E C O O R D I N A T E D )
Regardless of the local time, UTC time is used throughout the
world as a uniform reference point for flight schedules. UTC is
the time basis for worldwide operational control by the majority
of airlines and for air traffic control.
T Z C ( T I M E Z O N E C O R R E C T O R )
Local times throughout the world are, for the most part, divided
into time zones with a time difference of exactly one hour between
each zone. The function of the TZC (Time Zone Corrector) permits
rapid adjustment of the time display in one-hour steps by moving
the rotating bezel.
R E A D I N G T H E 2 4 - H O U R D I S P L A Y
Via the 24-hour display, your watch shows the current time of day
in the desired time zone. The 24-hour display is read off the inner
scale and allows differentiation between day and night.
P I L O T ' S W A T C H T I M E Z O N E R C H R O N O G R A P H