Introduction
WARNING
See the Important Safety and Product Information guide in
the product box for product warnings and other important
information.
Device Overview
À
Touchscreen
Á
Power key
Â
Automatic backlight sensor
Ã
32 GB microSD
®
On-Screen Buttons
These on-screen buttons may be displayed on some
screens and functions. Some buttons are accessible only
in a combination page or SmartMode™ layout.
Button Function
Clears the on-screen icons and re-centers the screen on
the boat
Opens a full screen view of the item
Creates a new waypoint
Creates a route, with turns, to the destination
Adds a turn to the route at the selected location
Removes the last turn added from the route
Creates a direct route, without turns, to the destination
Creates an Auto Guidance route to the destination
Begins navigation
Ends navigation
Acquires a radar target and begins tracking it
Opens the menu for the page or function
Opens the presets menu for the page or function
Tips and Shortcuts
• Press to turn on the chartplotter.
• From any screen, press repeatedly to scroll through
the brightness levels.
This can be helpful when the brightness is so low you
cannot see the screen.
• Select Home from any screen to return to the Home
screen.
• Select Menu to open additional settings about that
screen.
• Select Menu to close the menu when finished.
• Press to open additional options, such as adjusting
the backlight and locking the touchscreen.
• Press , and select Power > Turn Off System, or
hold until the Turn Off System bar fills to turn off the
chartplotter.
• Press , and select Power > Sleep Station to set the
chartplotter to standby mode.
• On the home screen of some models, swipe up or
down on the category buttons along the right side of the
screen to view the additional buttons.
On some models, not all category buttons are visible.
The arrows at the top or bottom of the buttons indicate
not all buttons are visible.
• On some menu buttons, select the button À to enable
the option.
A green light on an option indicates the option is
enabled Á.
• When available, select the arrows  to open the
menu.
On some buttons, when an option is selected Á, the
menu arrows  appear.
Accessing Owner's Manuals on the Chartplotter
1
Select Info > Owner's Manual.
2
Select a manual.
3
Select Open.
Downloading the Manuals from the Web
You can get the latest owner's manual and translations of
manuals from the Garmin® website. The owner's manual
includes instructions for using device features and
accessing regulatory information.
1
Go to www.garmin.com/manuals/GPSMAP8400
-8600.
2
Download the manual.
Inserting Memory Cards
You can use optional memory cards with the chartplotter.
Map cards allow you to view high-resolution satellite
imagery and aerial reference photos of ports, harbors,
marinas, and other points of interest. You can use blank
memory cards to record Garmin Quickdraw™ Contours
mapping, record sonar (with a compatible transducer),
transfer data such as waypoints and routes to another
compatible chartplotter or a computer, and use the
ActiveCaptain™ app.
This device supports up to a 32 GB microSDmemory card,
formatted to FAT32.
1
Pull down the weather cap À on the back of the
chartplotter.
2 Quick Start Manual