0 GPSMAP 640 Owner’s ManualMarine Mode: Using ChartsLocal Weather—view current weather conditions orforecasts reported by the nearest weather station (availablewith an optional GXM 40 XM antenna (see page 49)).Local Services—view a list of the marinas and marineservices closest to the object or area of the chart.Chart Notes—view National Oceanic and AtmosphericAdministration (NOAA) information associated with the chartcontaining the object.Viewing Aerial PhotosYou can view aerial photos of marinas and other navigationallysignificant landmarks in the region covered by an insertedBlueChart g2 Vision SD card.1. On the navigation chart, touch a camera icon.A standard camera icon ( ) indicates an overhead photo.A camera icon with a cone ( ) indicates a perspectivephoto. The photo was taken from the location of the camera,pointed in the direction of the cone.2. Touch Aerial Photo.•••••Using Perspective 3DPerspective 3D provides a view from above and behind the boat(according to your heading), and provides a visual navigation aid.When navigating, you can use the Perspective 3D screen to betterfollow your course, indicated by a highlighted line. See page 14 formore information on navigating with the GPSMAP 640.To access the Perspective 3D screen from the Home screen, touchCharts > Perspective 3D.Touch the button to move the view closer to your boat andlower to the water. Touch the button to move the view awayfrom the boat. This is momentarily indicated by the scale ( ) atthe bottom of the screen.
