GPSMAP 3xxx series Chartplotter Software Update

Garmin only offers one option to update Chartplotters or Sounder devices using a Garmin Data card. Please read the option below.

NOTE: This will only update the internal software version of the device. The mapping will not be updated in either process described below.

NOTE: Please backup all user data (i.e. waypoints, routes, and tracks) before performing any update. This will help ensure a backup exists if data is unintentionally lost. For instructions about backing up user data, please review the Related Content.

Option #1:

You can download the update from the Garmin webpage and apply it to the data card manually. The items you will need to download the update yourself are:

1. A 64MB Garmin Data Card*
2. A USB Data Card Programmer*
3. A computer loaded with a 32-bit version of Windows

With these three items, please download the latest update from this link. On this page, there is a link titled "View download instructions and system requirements" that will provide instructions on how to install this update onto the Garmin data card. Once the update has been applied to the card, please follow the installation instructions below.

Install Instructions:

Once the Update Card has been created, please follow the instructions below to install the update on your Chartplotter.

1. Power On the chartplotter
2. When the warning screen appears, choose I Agree
3. Insert the data card into the top data card slot labeled 1
4. After inserting the update card, the device should prompt for you to Update Software. Please press the Enter button
5. The device will now begin the update process for your device
6. During the installation of the update, the device will reboot itself. Please keep the update card inserted in the device until the chartplotter fully reboots and proceeds past the warning screen
7. Once the chartplotter has fully progressed past the warning screen, the update card can be removed and the device will be up to date

NOTE: Removing the update card before completing step #7 may corrupt the install process, thus rendering your devices inoperable.

*Garmin Data Cards and the Garmin Data Card Programmer are no longer available for purchase.