Volvo Penta GLASS COCKPIT Owner's Manual page 81

Surface Winds
Surface wind vectors appear on the Sea Conditions chart
using wind barbs that indicate the direction from which the
wind is blowing. A wind barb is a circle with a tail. The line
or flag attached to the tail of the wind barb indicates the
wind speed. A short line represents 5 knots, a long line
represents 10 knots, and triangle represents 50 knots.
Wind Barb
Wave Height, Wave Period, and Wave Direction
Wave heights for an area appear as variations in color.
Different colors indicate different wave heights, as shown
in the legend.
The wave period indicates the time (in seconds) between
successive waves. Wave period lines indicate areas that
have the same wave period.
Wave directions appear on the chart using red arrows.
The direction of each arrow pointer indicates the direction
in which a wave is moving.
Viewing Forecast Sea Conditions Information for
Another Time Period
1 Select Charts > Sea Conditions.
2 Select an option:
• To view forecasted sea conditions for the next 36
hours, in 12-hour increments, select
times.
• To view the forecasted sea conditions for the
previous 36 hours, in 12-hour increments, select
multiple times.
Viewing Sea Temperature Information
The Sea Temperature weather chart shows the present
water temperature and present surface pressure
conditions.
Select Charts > Sea Temperature.
Surface Pressure and Water Temperature Data
Surface-pressure information appears as pressure
isobars and pressure centers. Isobars connect points of
equal pressure. Pressure readings can help to determine
SiriusXM Weather
Wind Speed
Calm
5 knots
10 knots
15 knots
20 knots
50 knots
65 knots
multiple
weather and wind conditions. High-pressure areas are
generally associated with fair weather. Low-pressure
areas are generally associated with clouds and the
chance of precipitation. Isobars packed closely 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.
Changing the Sea Surface Temperature Color Range
You can change the color range dynamically to view
higher resolution sea surface temperature readings.
1 Select Charts > Sea Temperature > Menu > Sea
Temperature.
2 Select an option:
• To allow the chartplotter to adjust the temperature
range automatically, select Auto Configure.
The chartplotter automatically finds the lower and
upper limits for the current screen, and updates the
temperature-color scale.
• To enter the lower and upper limits for the
temperature range, select Lower Limit or Upper
Limit, and enter the lower or upper limit.
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 Charts > Visibility.
Viewing Forecast Visibility Information for Another
Time Period
1 Select Charts > Visibility.
2 Select an option:
• To view the visibility forecast for the next 36 hours,
in 12-hour increments, select
• To view the visibility forecast for the previous 36
hours, in 12-hour increments, select
times.
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 Buoy.
multiple times.
multiple
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