Raymarine E Series User Reference Handbook page 89

Range rings
Range rings give you an incremental representation of distance
from your vessel to help you judge distances at a glance. The rings
are always centred on your vessel, and the scale varies to suit your
current zoom setting. Each ring is labelled with the distance from
your vessel.
Enabling range rings
In the 2D chart view:
1. Press the MENU button.
2. Select Chart Setup .
3. Select 2D Set Up.
4. Select the ON option for the 2D Range Rings menu item.
Using the chart
NOWRad weather overlay
With a suitable weather receiver connected to your multifunction
display, you can overlay NOWRad weather information on the chart
display.
The NOWRad weather overlay provides NOWRad weather
information and reports in the chart application. You can adjust the
intensity of the overlay to achieve optimal visibility of both chart
and weather information.
Note: The NOWRad weather overlay can only be used in North
America and its coastal waters.
Enabling NOWRad weather overlay on the chart
In the 2D chart view:
1. Select the 2D CHART LAYERS softkey.
2. Select the ON option using the NOWRAD OVERLAY softkey.
Choosing weather reports for display on the chart
In the 2D chart view:
1. Select the 2D CHART LAYERS softkey.
2. Select the WEATHER REPORTS softkey.
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