Nikon D3S User Manual page 245

The k Icon
When the camera establishes
communication with a GPS device, a k icon
will be displayed in the top control panel.
Photo information for pictures taken while
the k icon is displayed will include a page of GPS data (0 233).
GPS data are only recorded when the k icon is displayed; confirm
that the k icon is displayed before shooting (a flashing k icon
indicates that the GPS device is searching for a signal; pictures
taken while the k icon is flashing will not include GPS data). If no
data are received from the GPS unit for two seconds, the k icon
will clear from the display and the camera will stop recording GPS
information.
A
Heading
The heading is only recorded if the GPS device
is equipped with a digital compass (note that
the GP-1 is not equipped with a compass).
Keep the GPS device pointing in the same
direction as the lens and at least 20cm (8 in.)
from the camera.
A
Coordinated Universal Time (UTC)
UTC data is provided by the GPS device and is independent of the
camera clock.
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