GPSMAP® 4000/5000 Series Owner’s Manual 19Charts and 3D Chart ViewsPerspective 3DPerspective 3D provides a view from above and behind the boat (according to your course) and provides avisual navigation aid. This view is helpful when navigating tricky shoals, reefs, bridges, or channels, and isbeneficial when trying to identify entry and exit routes in unfamiliar harbors or anchorages.From the Home screen, select Charts > Perspective 3D.Perspective 3D Navigation ChartAdjusting the View• Move the view closer to your boat and lower to the water:◦ For the GPSMAP 4000 series, press the Range (+) key.◦ For the GPSMAP 5000 series, touch the button.• Move the view away from the boat:◦ For the GPSMAP 4000 series, press the Range (-) key.◦ For the GPSMAP 5000 series, touch the button.The scale ( ) is momentarily indicated at the bottom of the screen.Rotating the Perspective 3D, Mariner’s Eye 3D, or Fish Eye 3D ViewsYou can rotate around your present location on the Perspective 3D, Mariner’s Eye 3D, or Fish Eye 3D chartviews.Note: Mariner’s Eye 3D and Fish Eye 3D Chart views are available only if you use a BlueChart g2 Visiondata card (page 21).1. From the Home screen, select Charts.2. Select Mariner’s eye 3D, Perspective 3D, or Fish eye 3D.3. Complete an action:• For the GPSMAP 4000 Series, press the Rocker left or right to rotate the 3D view.• For the GPSMAP 5000 Series, touch and drag the Navigation screen to the left or right to rotate the 3Dview.4. Select Stop Panning to stop rotating and return the screen to your present location.Perspective 3D Chart AppearanceShowing Range RingsThe range rings help you to visualize distances on Perspective 3D or Mariner’s Eye 3D.Note: Mariner’s Eye 3D is available with a preprogrammed BlueChart g2 Vision data card.1. From the Home screen, select Charts.2. Select Perspective 3D or Mariner’s eye 3D.3. Select Menu > Chart Appearance > Range Rings > on.