Garmin GXM 30A - Manual (Page 25)

GXM 30A XM Radio Smart Antenna Owner’s Manual 
Wave Direction
The Wave Direction feature shows the direction in which a
wave is moving, as indicated by the direction of the red arrow.
Wave Height
The Wave Height feature displays wave heights. The wave
heights for an area are separated by contour lines.
Wave Direction Wave Height
XM W
eather
f
eatures
> W
ave
d
IrectIon and
W
ave
h
eIght