GPSMAP 4000 Series Owner’s Manual 63
Using XM
USinG Xm
Understanding Water Temperature Data
The Water Temperature feature indicates the water’s surface temperature, as indicated by the legend
on the left of the screen. The temperature breaks are indicated by isotherm lines.
Viewing Fish Forecasting
This feature shows areas that contain optimal weather conditions for specic species of sh.
1. From the Home screen, select Weather > Fishing > Menu > Fish Species.
2. Select a species of sh. Shaded areas indicate optimal shing areas.
Viewing Visibility Information
Visibility is the forecast maximum horizontal distance that can be seen at the surface, as indicated
by the legend on the left of the screen. Contour lines on the Visibility feature show the forecasted
change in surface visibility.
From the Home screen, select Weather > Visibility.
To view the forecasted visibility for another time period:
1. From the Home screen, select Weather > Visibility > Next Forecast. The forecasted visibility for
the next 12 hours is shown.
2. Select Next Forecast again to view forecasts for the next 24 and 36 hours.
