Garmin GPSMAP 820 Owner's Manual - Page 9
Chart Symbols, Viewing Location and Object Information on a Chart, Navigating to a Point on - review
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2 Select SELECT. Chart Symbols This table contains some of the common symbols you might see on the detailed charts. Icon Description Buoy Information Marine services Tide station Current station Overhead photo available Perspective photo available Other features common to most charts include depth contour lines, intertidal zones, spot soundings (as depicted on the original paper chart), navigational aids and symbols, obstructions, and cable areas. Viewing Location and Object Information on a Chart You can view information about a location or an object on the Navigation chart or the Fishing chart. NOTE: The offshore Fishing chart is available with premium charts, in some areas. 1 From the Navigation chart or Fishing chart, select a location or object. A list of options appears along the right side of the chart. The options that appear vary based on the location or object you selected. 2 Select an option: • To view details of objects in the vicinity of the cursor, select Review. NOTE: Review does not appear if the cursor is not near an object. If the cursor is near only one object, the name of the object appears. • To navigate to the selected location, select Navigate To. • To mark a waypoint at the cursor location, select New Waypoint. • To view the distance and bearing of the object from your current location, select Measure Distance. The distance and bearing appear on the screen. Select Set Reference to measure from a location other than your current location. • To view tide, current, celestial, chart notes, or local services information near the cursor, select Information. Navigating to a Point on the Chart CAUTION The Auto Guidance feature is based on electronic chart information. That data does not ensure obstacle and bottom clearance. Carefully compare the course to all visual sightings, and avoid any land, shallow water, or other obstacles that may be in your path. When using Go To, a direct course and a corrected course may pass over land or shallow water. Use visual sightings, and steer to avoid land, shallow water, and other dangerous objects. NOTE: The offshore Fishing chart is available with premium charts, in some areas. NOTE: Auto Guidance is available with premium charts, in some areas. 1 From the Navigation chart or Fishing chart, select a location. 2 If necessary, select SELECT. 3 Select Navigate To. 4 Select an option: • To navigate directly to the location, select Go To. • To create a route to the location, including turns, select Route To. • To use Auto Guidance, select Guide To. 5 Review the course indicated by the magenta line. NOTE: When using Auto Guidance, a gray segment within any part of the magenta line indicates that Auto Guidance cannot calculate part of the Auto Guidance line. This is due to the settings for minimum safe water depth and minimum safe obstacle height. 6 Follow the magenta line, steering to avoid land, shallow water, and other obstacles. Viewing Details about Navaids From the Navigation chart, Fishing chart, Perspective 3D chart view, or Mariner's Eye 3D chart view, you can view details about various types of navigation aids, including beacons, lights, and obstructions. NOTE: The offshore Fishing chart is available with premium charts, in some areas. NOTE: Mariner's Eye 3D and Fish Eye 3D chart views are available with premium charts, in some areas. 1 From a chart or 3D chart view, select a navaid. 2 If necessary, select Review. 3 Select the name of the navaid. Premium Charts CAUTION The Auto Guidance feature is based on electronic chart information. That data does not ensure obstacle and bottom clearance. Carefully compare the course to all visual sightings, and avoid any land, shallow water, or other obstacles that may be in your path. NOTE: Not all models support all charts. Optional premium charts, such as BlueChart® g2 Vision®, allow you to get the most out of your chartplotter. In addition to detailed marine charting, premium charts may contain these features, which are available in some areas. Mariner's Eye 3D: Provides a view from above and behind the boat for a three-dimensional navigation aid. Fish Eye 3D: Provides an underwater, three-dimensional view that visually represents the sea floor according to the information on the chart. Fishing Charts: Shows the chart with enhanced bottom contours and without navigational data. This chart works well for offshore deep-sea fishing. High Resolution Satellite Imagery: Provides high-resolution satellite images for a realistic view of the land and water on the Navigation chart (Showing Satellite Imagery on the Navigation Chart). Aerial Photos: Shows marinas and other navigationally significant aerial photos to help you visualize your surroundings (Viewing Aerial Photos of Landmarks). Detailed Roads and POI data: Shows detailed road and point of interest (POI) data, which includes highly detailed coastal roads and POIs such as restaurants, lodging, and local attractions. Auto Guidance: Uses specified safe depth, safe height, and chart data to determine the best course to your destination. Auto Guidance is available when you navigate to a destination using Guide To. Charts and 3D Chart Views 3