2
GPSMAP 620 Owner’s Manual Supplement
You can display a compass tape at the top of the screen.
1. From the Home screen, touch
Charts
.
2. Touch the chart you want to view.
3. Touch
Menu
>
Data Bars
.
4. Touch
Compass Tape
to toggle the compass tape on or off.
You can overlay chart data and photographs on the Mariner’s Eye 3D relief when using a BlueChart g2 Vision card.
1. From the Home screen, touch
Charts
>
Mariner’s Eye 3D
>
Menu
>
Chart Appearance
>
Style
.
2. Touch an option:
Classic
—display without chart data or image data.
Charts
—overlay chart data.
Photos
—overlay image data.
Marine Mode: Other Vessels
The device displays a solid line for Automatic Identification System (AIS) vessel heading and a dashed line for course over ground.
You can control the trails for AIS vessels for a position history of the other vessels. The chart displays a line behind each AIS target
indicating the path of the vessel. This feature is available on all charts except the Fish Eye 3D chart.
1. From the Home screen, touch
Charts
.
2. Touch the chart you want to view.
3. Touch
Menu
>
Other Vessels
>
AIS Display Setup
>
Trails
.
4. Touch an option:
Touch the number of minutes that
you want to maintain a trail behind each AIS target.
Touch
Off
to turn trails off for all vessels.
You can control the trails for Digital Selective Calling (DSC) vessels
for a position history of the other vessels. The chart displays a black
line indicating the path of the vessel, a black dot for each reported position, and a
blue flag symbol for the last reported position. This
feature is available on all charts except the Fish Eye 3D chart.
1. From the Home screen, touch
Charts
.
2. Touch the chart you want to view.
3. Touch
Menu
>
Other Vessels
>
DSC Trails
.
4. Touch an option:
Touch the number of hours to show tracked vessels on the chart. For example, if you select
4 Hours
, the chart displays all trail
points less than four hours old for tracked vessels.
Touch
Off
to turn trails off for all vessels.
Marine Mode: Automatic Guidance (BlueChart g2 Vision Only)
There are connecting legs over shallow areas at the beginning and end of the path. This allows you to use automatic guidance to navigate to
a shore-based service. The device sounds an alarm when the boat approaches the shallow leg.
There is a control for shore-line proximity tolerance, which allows you to set a tighter margin for passage through narrow channels or set a
larger-distance margin from the shoreline.
1. From the Home screen, touch
Configure
>
Navigation
>
Auto Guidance
>
Shoreline Distance
.
2. Touch
Nearest
,
Near
,
Normal
,
Far
, or
Farthest
to indicate how close you want to travel to the shore.
This setting is used by the automatic-guidance calculation to determine how close to the shoreline you want the automatic-guidance
line to be. Changing this while navigating an automatic-guidance line will cause the path to be recalculated.
When following an automatic-guidance line, there is a navigation option to recalculate automatic guidance to the current destination from
the current position of the boat.
1.
While navigating an automatic-guidance line,
touch
Menu
from any chart.
2. Touch
Recalculate AutoGuidance
.
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