Garmin echoMAP CHIRP 73sv Owner's Manual

data includes buoys, lights, cables, depth soundings, 

marinas, and tide stations in an overhead view.

Perspective 3D: Provides a view from above and behind the 

boat (according to your course) and provides a visual 

navigation aid. This view is helpful when navigating tricky 

shoals, reefs, bridges, or channels, and is beneficial when 

trying to identify entry and exit routes in unfamiliar harbors or 

anchorages.

Mariner’s Eye 3D: Shows a detailed, three-dimensional view 

from above and behind the boat (according to your course) 

and provides a visual navigation aid. This view is helpful 

when navigating tricky shoals, reefs, bridges, or channels, 

and when trying to identify entry and exit routes in unfamiliar 

harbors or anchorages.
NOTE: Mariner's Eye 3D and Fish Eye 3D chart views are 

available with premium charts, in some areas.

Fish Eye 3D: Provides an underwater view that visually 

represents the sea floor according to the chart information. 

When a sonar transducer is connected, suspended targets 

(such as fish) are indicated by red, green, and yellow 

spheres. Red indicates the largest targets and green 

indicates the smallest.

Fishing Chart: Provides a detailed view of the bottom contours 

and depth soundings on the chart. This chart removes 

navigational data from the chart, provides detailed 

bathymetric data, and enhances bottom contours for depth 

recognition. This chart is best for offshore deep-sea fishing.

NOTE: The offshore Fishing chart is available with premium 

charts, in some areas.
The Navigation and Fishing charts allow you to plan your 

course, view map information, and follow a route. The Fishing 

chart is for offshore fishing.
To open the Navigation chart, select Charts > Navigation 

Chart.

To open the Fishing chart, select Charts > Fishing Chart.

The zoom level is indicated by the scale number at the bottom of 

the chart. The bar under the scale number represents that 

distance on the chart.
• Select   to zoom out.
• Select   to zoom in.

You can move the chart to view an area other than your present 

location.

From the chart, use the arrow keys.

Select BACK to stop panning and return the screen to your 

present location.
NOTE: To pan from a combination screen, select SELECT.

From a chart or 3D chart view, select  ,  ,  , or   to move 

the cursor.

Select SELECT.

From a chart, select a location.

Select Measure Distance.
A push pin appears on the screen at your present location. 

The distance and angle from the pin is listed in the corner.

TIP: To reset the pin and measure from the current location of 

the cursor, select SELECT.

This table contains some of the common symbols you might see 

on the detailed charts.

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.

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.

From the Navigation chart or Fishing chart, select a location.

If necessary, select SELECT.

Select Navigate To.

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 Auto Guidance.

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.

Follow the magenta line, steering to avoid land, shallow 

water, and other obstacles.

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.

Charts and 3D Chart Views

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