Nikon D300s - Manual (Page 226)

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❚❚The k Icon
When the camera establishes
communication with a GPS device, a
k icon
will be displayed in the control panel. Photo
information for pictures taken while the
k
icon is displayed will include a page of GPS data ( 0 214).
GPS data
are only recorded when the k icon is displayed; confirm that the k
icon is displayed in the control panel 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.