iwc AQUATIMER AUTOMATIC 2000 Operating Instructions Manual page 11

Marking the start of a dive
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The triangle on the rotating bezel can be aligned with
the minute hand by turning the rotating bezel anticlock-
wise. The desired point in time (e. g. the time of entering
the water at the start of the dive) can be set in this way.
You can read off the elapsed time (e. g. the duration
of the dive) on the rotating bezel. For safety reasons,
the rotating bezel can only be rotated in an anticlock-
wise direction. The rotating bezel is indexed audibly and
perceptibly in steps of one minute, and it is also legible
in the dark thanks to the luminescent markings.
If you are planning to use the watch to time dives,
you should have certification as an open water
diver and have the water-resistance of your watch
checked regularly by an IWC service centre.
Cleaning the watch after diving
After diving – and especially after diving in seawater –
you should rinse your watch under flowing mains water.
This will prevent salt incrustation on the case, bracelet
and clasp.