Humminbird ONIX Operating Manual page 54

Set up Humminbird
When Humminbird is selected as the map source, you can use the system defaults, or you can set the menu settings to your
preference. You can use the built-in Humminbird map, or you can install an SD chart card with additional Humminbird LakeMaster
features.
1. Select Humminbird as the map source.
2. Set the following menus to your preference:
Humminbird:
Chart Card Info
Water Level
Offset
Map Datum
NOTE: There are also alarm and display options that are exclusively available for Humminbird LakeMaster charts. See Navigation
Alarms Overview and Customize the Chart View for more information.
Chart Overview
Select this menu to review the information about the installed Humminbird chart card.
Adjust the setting to change the water level read by the control head. For example, if the lake
is down 5 feet, set the Water Level Offset setting to -5. The displayed numbers on the Contour
Lines will adjust from the Water Level Offset setting, and the water level offset will be
highlighted in brown to extend the land visually on the display.
To apply depth colors, depth highlight range, etc, go to the Chart X-Press Menu > Chart
Options > Preferences > Depth. See Open the Chart Preferences Menu for more information.
Use Map Datum to change the map coordinate system used by the control head to match
those of a paper map. Almost all electronic charts use the WGS84 Map Datum and most likely
do not require a setting change. (Default = WGS84)
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