Marine Mode: Using Charts; Using The Navigation Chart - Garmin GPSMAP 640 Owner's Manual

Marine Mode: Using Charts

Marine Mode: Using Charts
The GPSMAP 620 is loaded with a basic worldwide imagery map.
The GPSMAP 640 is loaded with a basic worldwide imagery map
and detailed BlueChart g2 offshore cartography for US waters.
®
You can use optional BlueChart g2 Vision
cards to get the most out of your device. For more information on
BlueChart g2 Vision, see page
There are four ways to view charts:
• Navigation Chart—displays an overhead view of the basic
worldwide imagery map and the optional BlueChart g2 Vision
charts and photos.
• perspective 3D—displays a view from above and behind your
boat for a visual navigation aid
• Mariner's eye 3D—displays a detailed, three-dimensional
view from above and behind your boat for a visual navigation
aid (page 11).
• Fishing Chart—removes navigational data from the chart and
enhances bottom contours for depth recognition
• Fish eye 3D—provides an underwater view that visually
represents the sea floor according to information on the chart
(page 11).
8
preprogrammed SD
®
10.
(page 10).
(page 11).
Note: Mariner's Eye 3D and Fish Eye 3D chart views are
available only if you use a BlueChart g2 Vision SD card
The Fishing chart is available if you use a BlueChart g2 Vision SD
card or a BlueChart g2 SD card, or if your built-in map supports
Fishing charts.

Using the Navigation Chart

From the Home screen, touch Charts
Use the Navigation chart to plan a course
information, and as a visual aid while navigating.
Panning the Navigation Chart
1. From the Home screen, touch
2. Touch and drag the chart to view other areas on the chart.
3. Touch Stop Panning to return the Navigation chart to your
current location.
Zooming In and Out on the Navigation Chart
The scale at the bottom of the chart (
level. The bar under the number represents the numeric scale
distance on the map.
Touch and to zoom in and out on the Navigation chart.
GPSMAP 620 and GPSMAP 640 Owner's Manual
(page 10).
> Navigation Chart.
(page 13), to view map
Charts > Navigation Chart.
) indicates the zoom