Garmin GDL 30 - Manual (Page 16)

 GDL 30/30A Owner’s Manual
Visibility
Visibility is the maximum horizontal distance that can be seen. Isobars on the Visibility feature show a change in visibility. In the example below, visibility ranges from
.5 miles to 3 miles.
Ths mage shows NEXRAD, Cloud Tops, and Vsblty. Dsplayng
multple features may help to provde a clearer pcture of the weather
condtons n the area.
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he
w
eather
F
eatures