Garmin GPSMAP 700 Series Manuale d'uso - Pagina 34

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Select Weather > Sea Conditions.

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

Wind Speed

Calm

5 knots

10 knots

15 knots

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

Select Weather > Sea Conditions.

Select an option:

• To view forecasted sea conditions for the next 12 hours,

select Next Forecast or , and to view forecasts, up to 36

hours, in 12-hour increments, select Next Forecast or

again.

• To view the forecasted sea conditions for the previous 12

hours, select Previous Forecast or , and to view

previous forecasts, up to 36 hours ago, in 12-hour

increments, select Previous Forecast or again.

Viewing Fishing Information

The weather Fishing chart shows present water temperature,

present surface pressure conditions, and fishing forecasts.

Select Weather > Fishing.

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 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.

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.

From the weather Fishing chart, select Weather > Fishing >

Menu > Fish Species.

Select a species of fish.

Wind Barb

Wind Speed

20 knots

50 knots

65 knots

Select On.

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.

Changing the Sea Surface Temperature Color Range

You can change the color range dynamically to view higher

resolution sea surface temperature readings.

From the weather Fishing chart, select Menu > Sea

Temperature.

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 Weather > Visibility.

Viewing Forecast Visibility Information for Another

Time Period

Select Weather > Visibility.

Select an option:

• To view the visibility forecast for the next 12 hours, select

Next Forecast or , and to view forecasts, up to 36 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 36 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.

From a weather chart, select .

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.

From a weather chart, select a location on the chart.

Select Local Weather.

Select an option:

• To view present weather conditions from a local weather

service, select Current Conditions.

• To view a local weather forecast, select Forecast.

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