Auto Guidance Line Configurations
The Safe Depth and Safe Height settings influence how the chartplotter calculates an Auto Guidance line. If an area has an unknown water depth or an unknown obstacle height, the Auto Guidance line is not calculated in that area. If an area at the beginning or the end of an Auto Guidance line is shallower than the safe water depth or lower than the safe obstacle height, the Auto Guidance line is not calculated in that area. On the chart, the course through those areas appears as a gray line. When your boat enters one of those areas, a warning message appears.
You can set the parameters the chartplotter uses when calculating an Auto Guidance line.
- Safe Depth
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Sets the minimum depth (chart depth datum) the chartplotter uses when calculating an Auto Guidance line.
NOTE: The minimum safe depth for the premium charts is 3 feet. If you enter a Safe Depth value of less than 3 feet, the charts only use depths of 3 feet for Auto Guidance route calculations. - Safe Height
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Sets the minimum height (chart height datum) of a bridge that your boat can safely travel under.
- Shoreline Distance
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Sets how close to the shore you want the Auto Guidance line to be placed. The Auto Guidance line may move if you change this setting while navigating. The available values for this setting are relative, not absolute. To ensure that the Auto Guidance line is placed the appropriate distance from shore, you can assess the placement of the Auto Guidance line using one or more familiar destinations that require navigation through a narrow waterway (Adjusting the Distance from Shore).