Garmin GXM 30A - Manual (Page 24)

GXM 30A XM Radio Smart Antenna Owner’s Manual
Water Temperature
The Water Temperature feature displays the water’s surface
temperature. The temperature breaks are indicated by isotherm
lines.
Wave Period
The Wave Period feature provides the time (in seconds)
between successive waves.
Water Temperature Wave Period
XM W
eather
f
eatures
> W
ater
t
eMPerature and
W
ave
P
erIod