NorthStar Navigation Explorer 538i - Manual (Page 40)

Northstar Explorer 538i/538 Installation and Operation Manual 40
Rotation
The options for chart rotation are:
North up: North is always at the top of the chart display.
Track up: The chart is rotated so that the boat direction is to the
top of the display. This option is useful for navigating narrow harbours
or rivers. The Explorer 538/538i asks for a course deviation; this is how
much the boat direction needs to change to make the chart redraw.
Tip: If the chart redraws too frequently, increase the course deviation
setting.
Course up: This option is only available if the boat is navigating
to a destination. The chart is rotated so that the plotted course to the
destination is vertical.
Palette
Select the Color scheme for the LCD display. The options are:
Normal
Sunlight: Brighter Colors, more visible in sunlight.
Night: Reversed Colors for night, to preserve night vision.
Map datum
Explorer 538/538i GPS positions are based on a worldwide reference
(datum) known as WGS 84. Most paper charts are based on WGS 84.
However, some paper charts are based on other datums In these cases,
the latitude and longitude coordinates of objects on the Explorer 538/538i
chart display are different to the latitude and longitude coordinates of
these objects on the paper chart. This applies to all objects, such as the
boat, waypoints, tracks, lines of latitude and longitude and cartographic
features such as land, rocks, buoys and depth contours.
Use Map datum to select the Explorer 538/538i map datum to
match the datum of the paper chart. Then, the latitude and longitude
coordinates of objects displayed on the Explorer 538/538i will change to
match the corresponding coordinates on the paper chart.
14-2 Setup > Chart
Press once or more until the Setup menu is displayed, then select Chart:
Factory reset
This option returns all of the Explorer 538/538i settings (except the language, waypoints and routes) to the
default factory settings shown on the setup menus.
SmartCraft
No SmartCraft gateway is fitted. Disable SmartCraft functions.
Normal SmartCraft operation
See section 15-7.