Simrad NSO Operation Manual page 99

Weather overlay transparency
The opaqueness of the weather overlay can be adjusted.
Weather alarms
You can setup the lightning or storm alarms to be within a certain range of your vessel.
You can also get an alarm is a severe weather forecast alarm is issued for your chosen
marine zone. A watchbox is defined by the National Weather Service. When the alarm is
turned on you will get an alarm if your vessel is inside or moves into a watchbox.
Weather reports
Marine zone
You can setup the system to read the forecast for a selected area.
The context help in the dialog shows how to use the keys to select marine zone.
If no area is selected the system will read the forecast for your current vessel position.
Tropical statements
You can read tropical statements including information about tropical weather conditions.
These statements are available only for specific areas.
Animating Sirius™ weather graphics
The NSO records the weather information you have turned on, and this information
can be used to animate past or future weather conditions. The amount of information
available in the system depends on the amount of weather activity,- the more complex it
is the less time will be available for animation.
You can animate the past or the future depending on which weather view you have
turned on:
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When activated the time for the current graphic animation will be displayed in the lower
left corner of the chart panel.
98 | Weather
Min transparency
if the precipitation overlay was turned on, you can animate for the past and only
assume weather conditions in the immediate future.
if the colored wave height overlay was turned on, you can animate the future (the
predictions)
Max transparency