Garmin GPSMAP 620 User manual

GPSMAP®620
owner’s manual

© 2008 Garmin Ltd. or its subsidiaries
Garmin International, Inc.
1200 East 151st Street,
Olathe, Kansas 66062, USA
Tel. [phone] or [phone]
Fax [phone]
Garmin (Europe) Ltd.
Liberty House
Hounsdown Business Park,
Southampton, Hampshire, SO40 9RB UK
Tel. [phone] (outside the UK)
0808 2380000 (within the UK)
Fax [phone]
Garmin Corporation
No. 68, Jangshu 2nd Road,
Shijr, Taipei County, Taiwan
Tel. [phone]
Fax [phone]
November, 2008 Part Number 190-01006-00 Rev. A Printed in Taiwan
All rights reserved. Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded or stored in any storage
medium, for any purpose without the express prior written consent of Garmin. Garmin hereby grants permission to download a single copy of this manual onto a hard drive
or other electronic storage medium to be viewed and to print one copy of this manual or of any revision hereto, provided that such electronic or printed copy of this manual
must contain the complete text of this copyright notice and provided further that any unauthorized commercial distribution of this manual or any revision hereto is strictly
prohibited.
Information in this document is subject to change without notice. Garmin reserves the right to change or improve its products and to make changes in the content without
obligation to notify any person or organization of such changes or improvements. Visit the Garmin Web site (www.garmin.com) for current updates and supplemental
information concerning the use and operation of this and other Garmin products.
Garmin
®
, the Garmin logo, GPSMAP
®
, BlueChart
®
, g2 Vision
®
, and MapSource
®
are trademarks of Garmin Ltd. or its subsidiaries, registered in the USA and other
countries. These trademarks may not be used without the express permission of Garmin.
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®
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GPSMAP 620 Owner’s Manual i
Introduction
Introduction
The GPSMAP
®
620 is both a marine and an automotive GPS-
enabled navigation device. The automotive kit, which includes both
the automotive maps and the automotive mount is sold separately.
When you place the device in the mount installed on your boat,
it powers on in marine mode. When you place the device in the
automotive mount, it powers on in automotive mode.
This manual is divided in two sections; the rst section describes
how to use the GPSMAP 620 in marine mode, and the second
section describes how to use the device in automotive mode. The
sections are labeled with tabs along the edge of the page to help
identify the usage mode.
See the Important Safety and Product Information guide in the product
box for product warnings and other important information.
Product Registration
Help us better support you by completing our online registration
today. Go to http://my.garmin.com. Keep the original sales receipt,
or a photocopy, in a safe place.
Contact Garmin®
Contact Garmin Product Support if you have any questions while
using your GPSMAP 620. In the USA, go to www.garmin
.com/support, or contact Garmin USA by phone at [phone]
or [phone].
In the UK, contact Garmin (Europe) Ltd. by phone at 0808
2380000.
In Europe, go to www.garmin.com/support and click Contact
Support for in-country support information, or contact Garmin
(Europe) Ltd. by phone at +44 (0) 870.8501241.
Manual Conventions
In this manual, when you are instructed to touch something, use
your nger to touch that item on the screen. Small arrows (>) used
in the text indicate that you should touch a series of items in order.
For example, if you see, “Touch Charts > Navigation Chart”,
you should touch the Charts button on the screen, and then touch
Navigation Chart.

ii GPSMAP 620 Owner’s Manual
Table of Contents
Table of Contents
Introduction...........................................................................i
Product Registration ..................................................................... i
Contact Garmin®................................................................................... i
Manual Conventions ..................................................................... i
Getting Started.....................................................................1
Identifying the GPSMAP 620 Features ........................................ 1
Identifying the GPSMAP 620 Mounting Bracket Features ........... 1
Using the Mounting Bracket......................................................... 2
Powering the GPSMAP 620 On and Off ...................................... 3
Removing and Inserting the Battery Pack.................................... 3
Inserting and Removing a Secure Digital (SD) Card ................... 4
Marine Mode: Getting Started ............................................5
Step 1: Mount Your GPSMAP 620 ............................................... 5
Step 2: Congure Your GPSMAP 620 ......................................... 5
Step 3: Acquire Satellites ............................................................. 5
Step 4: Use Your GPSMAP 620................................................... 5
Navigating Directly to a Destination ............................................. 6
Saving Your Current Location ...................................................... 6
Navigating Directly to a Saved Location ...................................... 7
Stopping Navigation..................................................................... 7
Adjusting the Volume ................................................................... 7
Adjusting the Backlight................................................................. 7
Marine Mode: Using Charts................................................8
Using the Navigation Chart .......................................................... 8
Interacting With Objects on the Navigation Chart ........................ 8
Accessing Additional Object or Chart Information........................ 9
Using Mariner’s Eye................................................................... 10
Using BlueChart g2 Vision ......................................................... 10
Using Mariner’s Eye 3D ..............................................................11
Using Fish Eye 3D ......................................................................11
Using Fishing Charts...................................................................11
Enabling High-Resolution Satellite Imagery............................... 12
Marine Mode: Navigating..................................................13
Step 1: Choose a Destination .................................................... 13
Step 2: Set and Follow the Course ............................................ 13
Marine Mode: Where To? ..................................................19
Searching For Marine Services.................................................. 19
Searching for Waypoints............................................................ 19
Searching for Saved Routes ...................................................... 19
Searching for Saved Tracks....................................................... 20
Searching by Name ................................................................... 20
Marine Mode: Using Waypoints and Tracks ...................21
Using Man Overboard (MOB) Waypoints................................... 21
Marking a Waypoint at Your Current Location............................ 21
Creating a Waypoint From the Navigation Chart ....................... 21
Editing Waypoint Details ............................................................ 22

GPSMAP 620 Owner’s Manual iii
Table of Contents
Using Tracks .............................................................................. 22
Marine Mode: Using the Dashboard ................................24
Using the Compass Screen ....................................................... 24
Using the Numbers Screen........................................................ 25
Using the Trip Screen ................................................................ 25
Marine Mode: Viewing Almanac Data ..............................26
Viewing Tide Station Information ............................................... 26
Viewing Current Information ...................................................... 26
Viewing Celestial Information..................................................... 27
Marine Mode: Managing User Data..................................28
Transferring Data (Waypoints, Routes, Tracks) to or
From an SD Card .................................................................... 28
Backing up Data to a PC............................................................ 28
Copying or Merging MapSource®Data to the GPSMAP 620..... 29
Marine Mode: Managing Information From
Other Vessels.....................................................................30
Viewing AIS Information............................................................. 30
Viewing DSC Information........................................................... 30
Marine Mode: Advanced Conguration...........................32
Conguring System Settings...................................................... 32
Changing Units of Measure ....................................................... 33
Conguring Communications Settings....................................... 34
Conguring Alarm Settings ........................................................ 34
Conguring My Boat .................................................................. 35
Conguring Other Vessels ......................................................... 36
Conguring Navigation Chart Options ....................................... 36
Conguring Mariner’s Eye Options and
Mariner’s Eye 3D Options ....................................................... 39
Fish Eye 3D Settings ................................................................. 40
Fishing Chart Settings............................................................... 40
Conguring the Active Track Options......................................... 41
Conguring the Numbers Screen............................................... 41
Automotive Mode: Getting Started ..................................42
Step 1: Mount Your GPSMAP 620 ............................................. 42
Step 2: Congure Your GPSMAP 620 ....................................... 42
Step 3: Acquire Satellites ........................................................... 42
Step 4: Use Your GPSMAP 620................................................. 42
Finding Your Destination ............................................................ 43
Adding a Stop ............................................................................ 43
Taking a Detour.......................................................................... 43
Stopping the Route .................................................................... 43
Automotive Mode: Where To?..........................................44
Finding an Address .................................................................... 44
Setting a Home Location............................................................ 44
Go! Page Options ...................................................................... 45
Finding a Place by Spelling the Name ...................................... 45
Searching Near Another Location .............................................. 45

iv GPSMAP 620 Owner’s Manual
Table of Contents
Finding Recently Found Places ................................................. 45
Favorites .................................................................................... 46
Finding a Place Using the Map .................................................. 46
Using Custom Routes ................................................................ 47
Entering Coordinates ................................................................. 48
Navigating Off Road................................................................... 48
Automotive Mode: Using the Map....................................49
Next Turn ................................................................................... 49
Turn List ..................................................................................... 49
Trip Computer ............................................................................ 50
Automotive Mode: Managing Files ..................................51
Loading Files.............................................................................. 51
Deleting Files ............................................................................ 51
Automotive Mode: Using the Tools .................................52
Settings ...................................................................................... 52
Where Am I? .............................................................................. 52
Picture Viewer............................................................................ 52
My Data...................................................................................... 52
Automotive Mode: Advanced Conguration ..................53
Changing the System Settings................................................... 53
Changing the Navigation Settings.............................................. 53
Adjusting the Display Settings ................................................... 53
Adjusting the Volume ................................................................. 54
Adjusting the Backlight............................................................... 54
Updating the Time Settings........................................................ 54
Setting the Languages ............................................................... 54
Changing the Map Settings........................................................ 54
Changing Security Settings........................................................ 55
Restoring All Settings................................................................. 55
Appendix ............................................................................56
Calibrating the Screen ............................................................... 56
Resetting Your GPSMAP 620 .................................................... 56
Updating the Software ............................................................... 56
Clearing User Data .................................................................... 56
Battery Information .................................................................... 56
Charging Your GPSMAP 620..................................................... 57
Changing the Fuse on the Automotive Mount............................ 57
Caring for Your GPSMAP 620 ................................................... 57
Additional Maps ......................................................................... 58
About GPS Satellite Signals ...................................................... 58
Extras and Optional Accessories ............................................... 59
Specications............................................................................. 59
Declaration of Conformity .......................................................... 60
Software License Agreement ..................................................... 60
Troubleshooting ........................................................................ 60
Messages and Alarms (Marine Mode) ....................................... 61
Index ...................................................................................62

GPSMAP 620 Owner’s Manual 1
Getting Started
Getting Started
Identifying the GPSMAP 620 Features
➍
➊
➋
➌
➎
➏
➊
Power button—manually turn the device on or off.
➋
DC in—power the device and recharge the battery with an
external power cable.
➌
MCX connector—connect an external GPS antenna.
➍
USB connector—connect the device to a computer.
➎
Battery locking ring—lift and rotate counter-clockwise to
release the battery.
➏
Battery—removable lithium-ion rechargeable battery.
Identifying the GPSMAP 620 Mounting
Bracket Features
➊
➌
Marine
Mounting Bracket
➋
➌
Automotive
Mounting Bracket
➊
Bail-mount adapter—connect the marine mounting bracket to
the marine bail mount.
➋ Ball-socket adapter—connect the mounting bracket adapter to
a compatible automotive dash mount (The automotive kit is an
optional accessory for the GPSMAP 620).
➌
Audio line out—connect the unit to an audio output source
with a standard
1
/
8
in. (3.5 mm) stereo audio plug.
NOTE: When you remove the GPSMAP 620 from the marine
mounting bracket, dry the metal contacts and use the attached
weather cap to prevent corrosion.

2 GPSMAP 620 Owner’s Manual
Getting Started
CAUTION: The ball-socket adapter on the GPSMAP 620 is not
compatible with Garmin automotive mounts other than the included
mount. Do not mount the device on a windshield.
Using the Mounting Bracket
CAUTION: Do not use the automotive mounting bracket in your
boat. The power connector and speaker assembly are not water
resistant, and therefore unsuitable for marine use. Additionally, do
not use the automotive-mount base in your boat. The automotive-
mount base does not connect to the dashboard using mounting
hardware, and therefore is not stable in marine conditions.
To install the marine mounting bracket in your boat, see the
GPSMAP 620/640 Marine Mount Installation Instructions.
To install the automotive mounting bracket in your car:
1. Place the automotive-mount base on your dash, and press
down on each of the four sides. The base bends and conforms
to your dashboard.
2. Snap the mounting bracket onto the automotive-mount arm.
3. Plug the vehicle power cable into a power outlet in your vehicle.
TIP: If the bottom surface of the automotive-mount slides on the
dash due to dust and dirt build-up, wipe it clean using a wet cloth.
To place the GPSMAP 620 in
the mounting bracket:
1. Flip up the locking tab on top of
the mounting bracket.
2. Fit the bottom of the device into
the cradle.
3. Tilt the device back until it
stops.
4. Flip down the locking tab to
hold the device in the mounting
bracket.
To remove the GPSMAP 620 from the mounting bracket:
1. Flip up the locking tab on top of the mounting bracket.
2. Tilt the device forward, and lift it out of the mounting bracket.
Placing the GPSMAP 620 in
the Mounting Bracket
Placing the GPSMAP 620 in
the Mounting Bracket

GPSMAP 620 Owner’s Manual 3
Getting Started
Powering the GPSMAP 620 On and Off
Power on the GPSMAP 620:
• If the mounting bracket on your boat or in your car is connected
to power, the device powers on when you place it in the mount.
• To power on the device manually, press and hold the Power
key until the Garmin logo appears on the screen.
Power off the GPSMAP 620:
• When you remove the device from the mounting bracket, you
will be prompted to continue on battery power. Touch Turn Off
to power off the device.
• To power off the device manually, press and hold the Power
key until the unit powers off.
NOTE: If you manually turn off the device while it is connected to
a power source, it will continue to charge the battery
CAUTION: If the marine mounting bracket is not wired through
the ignition or a switch, the GPSMAP 620 will drain the boat
battery, even when powered off. Remove the device from the
mounting bracket to avoid draining the boat battery.
Removing and Inserting the Battery Pack
WARNING: This product contains a lithium-ion battery. To prevent damage,
remove the unit from the vehicle when exiting or store it out of direct sunlight.
To remove the battery pack:
1. Remove the GPSMAP 620 from the mounting bracket.
2. On the back of the device, lift up the battery locking ring and
turn it counter-clockwise.
3. Tilt the battery pack away from the device and lift it out.
To Insert the battery pack:
1. On the back of the GPSMAP 620, t the bottom of the battery
pack into the device.
2. Tilt the battery pack towards the device until it is tight.
3. Turn the locking ring clockwise to lock the battery pack in place.
Important battery notes:
• Before using the GPSMAP 620 for the rst time, charge the
battery for at least six hours.
• The lithium-ion battery pack used in the device is primarily a
backup battery source. Use the device in a mount with external
power whenever possible.

4 GPSMAP 620 Owner’s Manual
Getting Started
• If the device will not be used for an extended time (longer than
one week), remove the battery pack.
CAUTION: The GPSMAP 620 is waterproof to the IPX7 standard
only when the battery is connected and locked in place. Use
extreme caution around water when removing the battery from the
device.
Inserting and Removing a Secure Digital
(SD) Card
To preserve the IPX7 water resistance of the GPSMAP 620, the SD
card slot is located under the battery.
To insert an SD card:
1. Remove the battery pack. The SD card slot is in the bottom of
the battery compartment, on the opposite side from the battery
contacts.
2. Place an SD card into the opening, label out, with the SD card
contacts facing away from the battery contacts.
3. Slide the SD card into the SD card slot, and press until it clicks
softly and locks in place.
4. Insert the battery pack.
Inserting an SD Card
To remove an SD card:
1. Remove the battery.
2. Press in on the SD card until it clicks softly and releases from
the SD card slot.
3. Remove the SD card.

GPSMAP 620 Owner’s Manual 5
Marine Mode: Getting Started
Marine Mode: Getting Started
Step 1: Mount Your GPSMAP 620
1. Install the marine mount in your boat according to the
GPSMAP 620/640 Marine Mount Installation Instructions.
2. Place the GPSMAP 620 in the marine mounting bracket (see
page 2).
Step 2: Congure Your GPSMAP 620
To power on your GPSMAP 620 if it does not power on
automatically, press and hold the Power key until the Garmin
logo appears on the screen. Follow the on-screen prompts to set up
the marine mode on the device for the rst time. To power off your
GPSMAP 620, press and hold the Power key.
Step 3: Acquire Satellites
1. Go outdoors to an open area, away from tall buildings and
trees.
2. Turn on your GPSMAP 620.
Acquiring satellite signals can take a few minutes. The bars
indicate satellite strength. When at least one of the bars is green,
your GPSMAP 620 has acquired satellite signals. Now you can
select a destination and navigate to it.
Step 4: Use Your GPSMAP 620
➊ ➋ ➌ ➍
➎
Marine Mode: Home Screen
➊
Usage mode. A boat icon represents marine mode, and a car
icon represents automotive mode. Touch this icon to change
modes.
➋
GPS satellite strength.
➌
Battery status.
➍
Current time.
➎
Home screen categories and actions. Touch an icon to view the
associated menu or perform the associated action.

6 GPSMAP 620 Owner’s Manual
Marine Mode: Getting Started
Navigating Directly to a Destination
1. From the Home screen, touch Charts > Navigation Chart.
2. On the Navigation chart, touch the place you would like to
navigate to.
Touch and to zoom in and out. Touch anywhere on
the chart and drag it to pan the map.
For more information on using charts, see page 8.
3. When the pointer icon is on the location you want to navigate
to, touch Navigate To > Go To.
4. Follow the magenta line drawn between your current location
and your destination. Navigate with caution; avoid land masses
and obstacles while following the line to your destination.
Tips:
• In addition to navigating directly to your destination, you
can create a route or allow the device to create a route. For
advanced navigation options, see page 13.
• You can also use the Compass screen to actively navigate to
your destination by following a pointer on a compass.
See page 24 for more information.
•
•Navigating Directly to a Destination
Navigation
information
Position and
heading
Direction to
destination
Saving Your Current Location
To save a location, such as your marina or a good shing spot,
mark it as a waypoint.
1. From the Home screen, touch Mark.
2. If you want to name the waypoint, touch Edit Waypoint >
Name. Use the on-screen keyboard to enter a name other than
the number assigned to the waypoint by default.

GPSMAP 620 Owner’s Manual 7
Marine Mode: Getting Started
Navigating Directly to a Saved Location
1. From the Home screen, touch Where To? > Waypoints.
2. Touch the waypoint you want to navigate to.
3. Touch Navigate To > Go To.
4. Follow the magenta-highlighted line drawn between your current
location and your destination. Navigate with caution; avoid
land masses and obstacles while following the line to your
destination.
Tips:
• In addition to navigating directly to your destination, you
can create a route or allow the device to create a route. For
advanced navigation options, see page 13.
• You can also use the Compass screen to actively navigate to
your destination by following a pointer on a compass.
See page 24 for more information.
Stopping Navigation
1. While navigating, from the Navigation chart, touch Menu.
2. Touch Stop Navigation.
NOTE: you can also stop navigation from the Where To? screen.
Adjusting the Volume
1. From any screen, press and quickly release the Power key.
2. Touch Volume.
3. Touch and drag the volume slider bar left to decrease the
volume and right to increase the volume. The box to the right of
the volume slider bar shows the volume level as a percentage.
To mute the volume, touch the box to the right of the volume slider
bar. The word Mute replaces the volume percentage.
NOTE: The GPSMAP 620 must be connected to an external audio
source for you to hear audio alerts.
Adjusting the Backlight
1. From any screen, press and quickly release the Power key.
2. Touch and drag the backlight slider bar left to decrease the
brightness and right to increase the brightness. The box to the
right of the backlight slider bar shows the backlight level as a
percentage.
Touch Color Mode to change between Day Colors and Night
Colors. The Auto setting automatically changes the colors
depending on the time of day.

8 GPSMAP 620 Owner’s Manual
Marine Mode: Using Charts
Marine Mode: Using Charts
The GPSMAP 620 is loaded with a basic worldwide imagery map.
You can use optional BlueChart g2 Vision
®
preprogrammed
SD cards to get the most out of your GPSMAP 620. For more
information on BlueChart g2 Vision, see page 10.
There are four ways to view charts on a GPSMAP 620 device:
Navigation Chart—displays an overhead view of the basic
worldwide imagery map and the optional BlueChart g2 Vision
charts and photos.
Mariner’s Eye (or Mariner’s Eye 3D)—displays a view from
above and behind your boat for a visual navigation aid (page
10).
Fishing Chart—removes navigational data from the chart and
enhances bottom contours for depth recognition (page 11).
Fish Eye 3D—provides an underwater view that visually
represents the sea oor according information on the chart
(page 11).
NOTE: Mariner’s Eye 3D, Fishing Charts, and Fish Eye 3D
views are only available when using optional Blue Chart g2 Vision
preprogrammed SD cards. See page 10.
•
•
•
•
Using the Navigation Chart
From the Home screen, touch Charts > Navigation Chart.
Use the Navigation chart to plan a course (see page 13), to view
map information, and as a visual aid while navigating.
Panning the Navigation Chart
1. From the Home screen, touch Charts > Navigation Chart.
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 ( ) indicates the zoom
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.
Interacting With Objects on the Navigation
Chart
1. Touch a point on the Navigation chart.

GPSMAP 620 Owner’s Manual 9
Marine Mode: Using Charts
2. Touch an option:
NOTE: The options that appear are dynamic, and depend on the
point you touched.
Review—view details of the chart objects near the pointer.
(Review only appears if the pointer is near multiple objects
on the chart—if the pointer is near only one object, the name
of the object appears instead of Review.)
Navigate To—view the navigation options (page 13).
Create Waypoint—marks a waypoint at the location of the
pointer (page 21).
Information—view additional information about an object or
area of the chart.
Measure Distance—view the distance and bearing of the
object from your current location. The information appears
in a window on the upper-left corner of the screen. Touch
Set Reference to measure from a location other than your
current location.
NOTE: You can touch and drag the pointer to a new location.
•
•
•
•
•
Accessing Additional Object or Chart
Information
1. Touch an object on the chart or an area of the chart.
2. Touch Information, and choose from the following options:
Tides—view tide information provided by the tide station
closest to the object or area of the chart (page 26).
Currents—view current information provided by the current
station closest to the object or area of the chart (page 26).
Celestial—view sunrise and sunset almanac data for the
object or area of the chart (page 27).
Local Services—view a list of the marinas and marine
services closest to the object or area of the chart.
Chart Notes—view National Oceanic and Atmospheric
Administration (NOAA) information associated with the chart
containing the object.
Viewing Aerial Photos
You can view aerial photos of marinas and other navigationally
signicant landmarks when using a BlueChart g2 Vision SD card.
1. On the navigation chart, touch a camera icon.
A standard camera icon ( ) indicates an overhead photo.
•
•
•
•
•
•

10 GPSMAP 620 Owner’s Manual
Marine Mode: Using Charts
A camera icon with a cone ( ) indicates a perspective
photo. The photo was taken from the location of the camera,
pointed in the direction of the cone.
2. Touch Aerial Photo.
Using Mariner’s Eye
Mariner’s Eye 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 Mariner’s Eye screen to better
follow your course, indicated by a highlighted line.
See page 13 for more information on navigating with the
GPSMAP 620.
To access the Mariner’s Eye screen from the Home screen, touch
Charts > Mariner’s Eye.
Touch the button to move the view closer to your boat and
lower to the water. Touch the button to move the view away
from the boat. This is momentarily indicated by the scale ( ) at
the bottom of the screen.
•
Using BlueChart g2 Vision
Optional BlueChart g2 Vision preprogrammed SD cards allow you
to get the most out of your GPSMAP 620. In addition to detailed
marine charting, BlueChart g2 Vision has the following features:
Mariner’s Eye 3D—provides a view from above and behind
the boat for a three-dimensional navigation aid. The BlueChart
g2 Vision Mariner’s Eye 3D is more detailed than the standard
Mariner’s Eye screen.
Fish Eye 3D—provides an underwater, three-dimensional
view that visually represents the sea oor according to the
information on the chart.
Fishing Charts—displays the chart with enhanced bottom
contours and without navigational data. This chart works well
for offshore deep-sea shing.
High Resolution Satellite Imagery—provides high resolution
satellite images for a realistic view of the land and water on the
Navigation chart.
Detailed Roads and POI data—displays roads, restaurants,
and other points of interest (POIs) along the shore.
Auto Guidance—uses specied safe-depth, safe-height, and
chart data to suggest the best passage to your destination.
•
•
•
•
•
•

GPSMAP 620 Owner’s Manual 11
Marine Mode: Using Charts
Using Mariner’s Eye 3D
When using a BlueChart g2 Vision SD card, you can view the
Mariner’s Eye 3D screen. The Mariner’s Eye 3D screen is similar
to the Mariner’s Eye screen (page 10), but is much more detailed.
This view is helpful when navigating tricky shoals, reefs, bridges,
or channels, and is benecial when trying to identify entry and
exit routes in unfamiliar harbors or anchorages. Mariner’s Eye 3D
provides a three-dimensional view of both the shore and sea oor.
To access the Mariner’s Eye 3D screen from the Home screen,
touch Charts > Mariner’s Eye 3D.
As with the Mariner’s Eye screen, touch the button to move
the view closer to your boat and lower to the water. Touch the
button to move the view away from the boat. This is momentarily
indicated by the scale ( ) at the bottom of the screen.
Using Fish Eye 3D
Using the depth contour lines of the BlueChart g2 Vision
cartography, Fish Eye 3D provides an underwater view of the sea
oor or lake bottom. The and buttons adjust the view in the
same way as the Mariner’s Eye 3D.
To access the Fish Eye 3D screen from the Home screen, touch
Charts > Fish Eye 3D.
NOTE: When navigating, the magenta line will not appear on the
Fish Eye 3D screen, though any enabled navigation data bars will
appear.
Using Fishing Charts
Use the shing chart to view detailed bottom contours and depth
soundings on the chart. There are no navigation aids such as buoys
and lights on the shing chart.
The shing chart uses highly detailed bathymetric data contained
on a preprogrammed BlueChart g2 Vision SD card, and is best for
offshore deep-sea shing.
Navigation Chart
Fishing Chart
To access the Fishing chart screen from the Home screen, touch
Charts > Fishing Chart.
Touch and to zoom in and out on the Fishing chart.

12 GPSMAP 620 Owner’s Manual
Marine Mode: Using Charts
You can navigate using the Fishing chart just as you would using
the Navigation chart.
Enabling High�ResolutionHigh�Resolution Satellite
Imagery
You can overlay high-resolution satellite images on the land,
the sea, or both portions of the Navigation chart when using a
preprogrammed BlueChart g2 Vision SD card.
To enable satellite imagery:
1. While viewing the Navigation chart, touch Menu > Navigation
Chart Setup > Photos.
2. Touch one of the following:
Off—standard chart information is shown on the map.
Land Only—standard chart information is shown on water
with photos overlaying the land.
Photo Map Blend—photos overlay both the water and
the land at a specied opacity. The higher you set the
percentage, the more the satellite photos cover both water
and land.
When enabled, the high resolution satellite images are only present
at lower zoom levels. If you cannot see the high resolution images
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in your BlueChart g2 Vision region, zoom in by touching , or
set the detail level higher by touching Menu >Navigation Chart
Setup > Chart Appearance > Detail.

GPSMAP 620 Owner’s Manual 13
Marine Mode: Navigating
Marine Mode: Navigating
To navigate using the GPSMAP 620, rst choose a destination,
then set a course or create a route. Follow the course or route on
the Navigation chart or on the Mariner’s Eye or Mariner’s Eye 3D
screen.
TIP: You can also use the Compass screen to follow a course or
route. See page 24 for more information.
Step 1: Choose a Destination
You can choose a destination using either the Navigation chart or
the Where To? menu.
Choosing a Destination Using the Navigation
Chart
1. From the Home screen, touch Charts > Navigation Chart.
2. On the Navigation chart, touch the place you would like to
navigate to. The pointer icon indicates the destination on the
chart.
TIP: Touch and to zoom in and out. Touch anywhere on
the chart and drag it to pan the map. For more information on using
charts, see page 8.
Choosing a Destination Using Where To?
1. From the Home screen, touch Where To?
2. Touch a category:
Waypoints—view a list of locations you marked previously
(page 19).
Routes—view a list of routes you saved previously (page
19).
Tracks—view a list of recorded tracks (page 20).
Offshore Services—view a list of nearby marinas and other
offshore points of interest, listed by proximity (page 19).
Search by Name—search nearby marinas and other
offshore points of interest by name (page 20).
3. Touch the location you want to navigate to.
Step 2: Set and Follow the Course
You can set a course three ways:
Go To—(direct course) creates a direct line from your current
location to the destination (page 14).
Route To—create a route from the destination to your current
location, adding turns along the way (page 15).
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14 GPSMAP 620 Owner’s Manual
Marine Mode: Navigating
Guide To—use the chart data on a BlueChart g2 Vision SD card
to automatically suggest a passage from your current location to
the destination (page 17).
After you set the course, follow the course using the Navigation
chart, the Mariner’s Eye screen, or the Mariner’s Eye 3D screen.
Setting a Direct Course (Go To)
When the pointer icon is on the location you want to navigate
to, or you have selected a destination using Where To, touch
Navigate To > Go To.
Following a Direct Course (Go To) on the
Navigation Chart, Mariner’s Eye Screen, or
Mariner’s Eye 3D Screen
After you set the course using Go To, a magenta line represents
the direct course from the start point to the end point, and does not
move, even when you veer off course.
CAUTION: When using Go To, a direct course and a corrected
course may pass over land or shallow water. Steer to avoid land,
shallow water, and other dangerous objects.
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In the center of the magenta line is a thinner purple line that
represents the corrected course from your current location to the
end point. The corrected course line is dynamic, and it moves with
your boat when you veer off course.
1. After you set a course, from the Home screen, touch Charts
and then touch Navigation Chart, Mariner’s Eye, or Mariner’s
Eye 3D.
2. Follow the magenta line (direct course).
3. Steer off course to avoid land, shallow water, and other
obstacles on the water.
4. When you are off course, follow the purple line (corrected
course) to travel to your destination, or steer back to the
magenta line (direct course).
Corrected
course
Direct course
Start point
Following a Direct Course on the
Navigation Chart