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64 GPSMAP 188/188C Sounder Owner’s Manual
MAIN MENU > MAP TAB
Map Tab
The Map tab changes the display properties of the Map Page.
The following pages contain descriptions of the Map tab’s eight
sub tabs.
General Sub Tab
• Detail—Most, More, Normal, Less, Least: controls how
much map detail appears. This setting only applies to map
features set to Auto. Features that have a specified zoom
range or are turned off are unaffected by this setting.
• Orientation—North Up: fixes the top of the map display to
a north heading. Track Up: fixes the top of the map display
to the current track heading. Course Up: fixes the map so the
direction of navigation is always up.
• AutoZoom—On, Off: when On the map automatically
adjusts the map range to a lower range as you approach your
destination point.
• Color Mode—Water Mode, Land Mode: lightens the shade
of the water areas in Water Mode and land in Land Mode.
This option is only available on the GPSMAP 188.
Source Sub Tab
• Basemap—On/Off: turns the built-in basemap on or off.
• Data Card Maps—On/Off: turns on or off all BlueChart or
MapSource data loaded in the unit or on the data card.
• Built-in Maps—On/Off: turns on or off all built-in
BlueChart maps.