iwc Fliegeruhr Worldtime Mode D'emploi page 28

– Turn the hour hand forwards or backwards in one-hour steps
until the date display changes to today's date.
– If you turn the hour hand forwards: The hand will now be
positioned between 12 midnight and 1 a.m. Now turn the hour
hand forwards to the correct time. If you are setting the watch
in the afternoon, you must turn the hand past 12 (noon) again.
If you turn the hour hand backwards: The hand will now
be positioned between 11 p.m. and 12 midnight. Now turn the
hour hand backwards to the correct time. If you are setting the
watch in the morning, you must turn the hand past 12 (noon)
again.
– Now push the crown to position X and secure it by sim-
ultaneously turning it to the right.
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.
— 2 8 —
p i l o t ' s W a t c h W o r l d t i m e r