Manual Garmin GPSMAP 8417 MFD (page 46 of 62) (English)

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Pressure-

Center

Symbol

Description

Indicates a low-pressure center, which is a region of

relatively lower pressure. Moving away from a low-

pressure center results in increased pressure. Winds

flow counterclockwise around low-pressure centers in

the northern hemisphere.

Indicates a high-pressure center, which is a region of

relatively higher pressure. Moving away from a high-

pressure center results in decreased pressure. Winds

flow clockwise around high-pressure centers in the

northern hemisphere.

Viewing a Marine Forecast or an Offshore Forecast

Select Charts

> Forecast

Pan the chart to an offshore location.

The Marine Forecast or Offshore Forecast options appear

when forecast information is available.

Select

Marine Forecast or Offshore Forecast.

City Forecasts

City forecasts appear as weather symbols. The forecast is

viewed in 12-hour increments.

Symbol Weather Symbol Weather

Partly cloudy Fair (sunny, hot, clear)

Cloudy Rain (drizzle, sleet, showers)

Windy Foggy

Thunderstorms Snow (snow showers, flurries,

blizzard, blowing snow, sleet,

freezing rain, freezing drizzle)

Smoke (dusty, hazy)

Viewing Sea Conditions

The

Sea Conditions feature shows information about surface

conditions, including winds, wave height, wave period, and wave

direction.

Select

Charts

> 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 Wind Barb Wind Speed

Calm 20 knots

5 knots 50 knots

10 knots 65 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 Charts

> Sea Conditions

Select an option:

• To view forecasted sea conditions for the next 36 hours, in

12-hour increments, select Next Forecast multiple times.

• To view the forecasted sea conditions for the previous 36

hours, in 12-hour increments, select Previous Forecast

multiple times.

Viewing Fishing Information

The weather Fishing chart shows present water temperature,

present surface pressure conditions, and fishing forecasts.

Select

Charts

> 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 Menu >

Fish

Species

Select a species of fish.

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.

38 SiriusXM Weather

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Others manual(s) of Garmin GPSMAP 8417 MFD

Garmin GPSMAP 8417 MFD Installation Guide - English - 8 pages

Garmin GPSMAP 8417 MFD User Manual - German - 72 pages

Garmin GPSMAP 8417 MFD Installation Guide - German - 10 pages

Garmin GPSMAP 8417 MFD Installation Guide - Dutch - 10 pages

Garmin GPSMAP 8417 MFD User Manual - Dutch - 68 pages

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Garmin GPSMAP 8417 MFD Manual

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