Forecasting Fish Locations; Visibility Information; Viewing Forecast Visibility Information For Another Time Period; Viewing Buoy Reports - Garmin GPSMAP 800 series Owner's Manual

together show a strong pressure gradient. Strong pressure
gradients are associated with areas of stronger winds.
Pressure units are shown in millibars (mb), inches of Mercury
(inHg), or hectopascals (hPa).
Colored shading indicates the surface temperature of the water,
as shown in the legend in the corner of the display.

Forecasting Fish Locations

You can show areas that contain optimal weather conditions for
specific species of fish.
NOTE: This feature is not available on all devices and in all
subscriptions.
1 From the weather Fishing chart, select Weather > Fishing >
MENU > Fish Species.
2
Select a species of fish.
3
Select On.
4
Repeat steps 2 and 3 to show areas with optimal weather
conditions for additional species of fish.
Shaded areas indicate optimal fishing areas. If you have
selected more than one species of fish, you can select a
shaded area to view the fish species that are included in the
shaded area.

Visibility Information

Visibility is the forecast maximum horizontal distance that can
be seen at the surface, as shown in the legend on the left of the
screen. Variations in the visibility shading show the forecast
change in surface visibility.
NOTE: This feature is not available on all devices and in all
subscriptions.
Select Weather > Visibility.
Viewing Forecast Visibility Information for Another
Time Period
1
Select Weather > Visibility.
2
Select an option:
• To view the visibility forecast for the next 12 hours, select
Next Forecast or , and to view forecasts up to 48 hours,
in 12-hour increments, select Next Forecast or again.
• To view the visibility forecast for the previous 12 hours,
select Previous Forecast or , and to view previous
forecasts, up to 48 hours ago, in 12-hour increments,
select Previous Forecast or again.

Viewing Buoy Reports

Report readings are taken from buoys and coastal observation
stations. These readings are used to determine air temperature,
dew point, water temperature, tide, wave height and period,
wind direction and speed, visibility, and barometric pressure.
1
From a weather chart, select .
2
Select Review > Buoy.
Review does not appear if the cursor is not near an object. If
the cursor is near only one object, the name of the buoy
appears.

Viewing Local Weather Information near a Buoy

You can select an area near a buoy to view forecast
information.
1
From a weather chart, select a location on the chart.
2
Select Local Weather.
3
Select an option:
• To view present weather conditions from a local weather
service, select Current Conditions.
• To view a local weather forecast, select Forecast.
24
• To view surface wind and barometric pressure
information, select Sea Surface.
• To view wind and wave information, select Marine
Bulletin.

Creating a Waypoint on a Weather Chart

1
From a weather chart, select a location.
2 Select New Waypoint.

Weather Overlay

The weather overlay superimposes weather and weather-
related information on the Navigation chart, the Fishing chart,
and the Perspective 3D chart view. The Navigation chart and
the Fishing chart can show weather radar, height of cloud tops,
lightning, weather buoys, county warnings, and hurricane
warnings. The Perspective 3D chart view can show weather
radar.
Weather overlay settings configured for use on one chart are
not applied to another chart. The weather overlay settings for
each chart must be configured separately.
NOTE: The offshore Fishing chart is available with premium
charts, in some areas.

Turning On the Weather Overlay on a Chart

From the Navigation chart or Fishing chart, select MENU >
Chart Setup > Weather > Weather > On.

Weather Overlay Settings on the Navigation Chart

From the Navigation chart, select MENU > Chart Setup >
Weather.
Weather: Turns on and off the weather overlay.
Precipitation: Shows precipitation data.
Cloud Cover: Shows cloud cover data.
Satellite IR: Shows infrared satellite data, which displays clouds
based on cloud-top temperatures. Deeper shades of gray
represent colder clouds often found with cirrus or
thunderstorm clouds. Lighter shades or a lack of shading
indicate warmer clouds usually associated with stratus or
fog.
Buoys: Shows weather buoys.
Legend: Shows the weather legend.

Weather Overlay Settings on the Fishing Chart

From the Fishing chart, select MENU > Chart Setup >
Weather.
Precipitation: Shows precipitation radar.
Sea Temperature: Shows sea temperature data.
Buoys: Shows weather buoys.
Legend: Shows the weather legend.

Viewing Weather Subscription Information

You can view information about the weather services you have
subscribed to and how many minutes have passed since the
data for each service was updated.
Select Weather > Weather Subscription.

SiriusXM Radio

When you have a Garmin SiriusXM receiver connected to the
chartplotter, you may have access to SiriusXM satellite radio,
depending on your subscription.

Customizing the Channel Guide

SiriusXM radio channels are grouped in categories. You can
select the category of channels that appear in the channel
guide.
1
Select Media > MENU > Category.
SiriusXM ®