Garmin GPSMAP 640 Manual

Also see for GPSMAP 640: Quick reference guide Declaration of conformity Installation instructions Quick reference guide Owner's manual

Contents

GPSMAP 640 XM WX Satellite Weather and XM Satellite Radio Supplement 3Marine Mode: Using XM WX Weather and AudioWeather Warnings and Weather BulletinsWhen a marine weather warning or weather bulletin is issued, shading➊ indicates the area to which the warning or bulletin applies. To viewinformation about the warning or bulletin, select the shaded area. Thecyan lines ➋ on the chart indicate the boundaries of the warning orbulletin. Weather bulletins may consist of either weather watches orweather advisories.➊➋Color DescriptionRed Marine Warning (on water)Tornado Warning (on land)Yellow Severe Storm Warning (land only)Light Blue Flash Flood Warning (land only)Blue Flood Warning (land only)Forecast informationThe Forecast screen shows weather conditions, including fronts, pressurecenters, sea surface pressure, and city forecasts.Viewing Present Forecast informationFrom the Home screen, select Weather > Forecast.Viewing Forecast information for another Time Period1. From the Home screen, select Weather > Forecast.2. Complete an action:• Select Next Forecast to view the forecast weather for the next 12hours, and select Next Forecast again to view forecasts for thenext 24, 36, and 48 hours, in 12-hour increments.• Select Previous Forecast to view the forecast weather for theprevious 12 hours, and select Previous Forecast again to viewforecasts for the previous 24, 36, and 48 hours, in 12-hourincrements.Viewing a Coastal Forecast or an Offshore Forecast1. From the Home screen, select Weather > Forecast.2. Pan the chart to an offshore location.3. Select an offshore location.The Coastal Forecast or offshore Forecast options appear whenforecast information is available.4. Select Coastal Forecast or offshore Forecast.