GPSMAP 640 Owner’s Manual 45
Marine Mode: Advanced Conguration
Weather—congure the appearance of weather options on the
Fishing chart, as on the Navigation chart. See page 40. Instead of
Cloud Cover and Visibility, the weather appearance option on the
Fishing chart contains toggles for Sea Temp and Fish Species.
Chart Appearance
—customize the appearance of the Fishing
chart.
Orientation
—changes the perspective of the map display, as on
the Navigation chart. See page 42.
Detail—adjusts the amount of detail shown on the map.
Heading Line—draws an extension from the bow of the boat in
the direction of travel, as on the Navigation chart. See page 42.
Navaid Size—adjusts the size of the symbols shown on the
map.
Navaid Type
—sets the navaid symbol set (NOAA or IALA).
From the Home screen, touch Information > User Data > Tracks
> Active Track Options.
Record Mode—select Off, Fill, or Wrap
Off—does not record a track log.
Fill—records a track log until the track memory is full.
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Wrap—continuously records the track log, replacing the oldest
track data with new data.
Interval
—dene the frequency at which the track is recorded.
Recording more-frequent plots is more accurate, but lls the track
log faster.
Interval
—set whether the interval is determined by distance,
time, or resolution. (Touch Change to set the quantity.)
Distance—record the track based on a distance between
points.
Time
—record the track based on a time interval.
Resolution—record the track based on a variance from
your course. This setting is recommended for the most
efcient use of memory. The distance value (Change) is
the maximum error allowed from the true course before
recording a track point.
Change—set the value of the interval.
Track Color
—set the color of the track.
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