Simrad GB40, Manual

Page: 56 / 156

3.20 Chart: Chart boundaries on/off
You can switch the chart boundaries On or Off to show or hide the
boundaries of any charts in your licensed chart collection.
If you change this setting, it's also changed on any other display
units that show the same
Chart view.
¾
To change the chart boundaries setting:
•
Select
Chart Presentation
. (If this button is not in the
main menu, make the Chart pane active, or select
Return /
Settings
.)
• Select
Chart Presentation
.
•
The
Chart Boundary
button displays the current setting.
Select it to change the setting.
• When you are finished, select
Return
.
3.21 Chart: Guard zone - what is it?
The chart guard zone can help identify hazards that are marked on
the
Chart .
The chart guard zone is different from the radar guard zone. Use
them both to help ensure the safety of your vessel.
When the chart guard zone is On, two red lines are drawn on the
Chart . These start at your vessel and diverge out in the direction
that you're traveling. After a defined distance, they are joined
together by another line to form a triangular area that extends in
front of your vessel. This triangular area is the chart guard zone.
The chart guard zone also extends vertically down into the water
to a depth that is the same as the Safe Depth setting.
Objects within the chart guard zone that are marked on the Chart
and that could be dangerous to your vessel, such as a sea wall or
shallow water, will be highlighted on the
Chart .
3.22 Chart: Guard zone on/off
You can switch the chart guard zone On or Off.
If the chart guard zone is On, the chart guard zone is shown on all
the charts displaying the same
Chart view and the GB40 checks for
hazards that are marked on the chart. If a hazard is identified, the
guard zone alarm will operate if it's been turned on.
Chart | 55