Updating Built-In Maps with a Memory Card and Garmin Express

You can update the built-in maps using the Garmin Express™ computer application and a memory card.

Insert a memory card into the computer's card slot (Memory Cards).
Open the Garmin Express application.

If you do not have the Garmin Express application installed on your computer, you can download it from garmin.com/express.
If necessary, register your device (Registering Your Device Using the Garmin Express App).
Click Vessel > View Details.
Click Download next to the map to update.
Follow the on-screen instructions to complete the download.
Wait while the update downloads.

The update may take an extended period of time.
After the download is complete, eject the card from the computer.
Insert the memory card into the card slot (Memory Cards).
On the chartplotter, select > System > System Information > Update Built-In Map.

The updated chart appears on your chartplotter.

GPSMAP® 8400/8600/9000 Series