Keeping your Furuno map updates current is essential for accurate marine navigation and safe travel on the water. Updated charts provide the latest information about coastlines, waterways, harbors, navigation markers, depth contours, restricted areas, and other important marine details. If your Furuno GPS or chartplotter has outdated maps, you may experience inaccurate routes, missing locations, or outdated navigation information.

If you are looking for how to download Furuno map update, this guide explains the complete process, including checking your device compatibility, preparing storage media, downloading chart files, and installing the update successfully.

Why Download Furuno Map Updates?

Marine conditions constantly change due to new construction, dredging projects, updated navigation aids, and changes in waterways. Downloading the latest Furuno maps helps maintain accurate navigation.

Benefits of updated Furuno maps include:

• Updated marine chart information
• Improved route planning
• New and modified waterways
• Updated buoys and navigation markers
• Corrected depth information
• New ports and marina details
• Improved safety during navigation
• Better compatibility with newer Furuno software

Regular chart updates help ensure your navigation system provides reliable information during every trip.

Which Furuno Devices Support Map Updates?

Many Furuno navigation systems support chart updates, including:

• Furuno NavNet TZtouch Series
• Furuno NavNet TZtouch2
• Furuno NavNet TZtouch3
• Furuno GP-1971F
• Furuno GP-1871F
• Furuno GP-39 GPS Navigator
• Furuno Multifunction Displays (MFDs)
• Compatible Furuno chartplotters

The update method may vary depending on your specific model and chart provider.

Before Downloading a Furuno Map Update

Before starting the download process, prepare your system.

Check the following:

• Confirm your Furuno model number.
• Check your current chart version.
• Verify available storage space.
• Back up routes and waypoints.
• Ensure your device firmware is updated.
• Prepare a compatible SD or microSD card.

Using the correct chart files is important because different Furuno models support different chart formats.

What You Need to Download Furuno Maps

You will need:

• Computer with internet access
• SD or microSD card
• SD card reader
• Furuno chart update files
• Chart license or subscription (if required)
• Furuno GPS or chartplotter

Step 1: Identify Your Furuno GPS Model

Before downloading any map update:

1. Turn on your Furuno navigation device.
2. Open the system menu.
3. Select System Information.
4. Note your model number and software version.

Examples include:

• NavNet TZtouch3
• GP-1971F
• GP-1871F
• GP-39

Downloading maps for the wrong model may cause compatibility issues.

Step 2: Check Your Current Chart Version

To determine whether you need an update:

1. Open the chart menu.
2. Select chart information.
3. View the installed chart version.
4. Compare it with the latest available chart release.

If your charts are outdated, proceed with the update.

Step 3: Download the Latest Furuno Map Update

Locate the appropriate chart update package for your device and region.

When downloading, verify:

• Correct Furuno model compatibility
• Correct geographic coverage
• Latest chart version
• Required license information

Download the chart files to your computer.

Large chart packages may take some time depending on your internet speed.

Step 4: Prepare the SD Card

After downloading the map update:

1. Insert the SD card into your computer.
2. Format the card if required.
3. Extract the downloaded chart files.
4. Copy the files to the SD card.
5. Keep the folder structure unchanged.
6. Safely eject the card.

Do not modify or rename chart files.

Step 5: Insert the SD Card Into Your Furuno Device

Follow these steps:

1. Turn off your Furuno GPS or chartplotter.
2. Insert the SD card containing the map update.
3. Turn the device on.
4. Wait for the system to recognize the new charts.

Some models automatically detect the update, while others require manual selection.

Step 6: Install the Furuno Map Update

Navigate through the device menu:

Menu → Chart Settings → Chart Management → Update Charts

Select the available chart update.

Follow the on-screen instructions to complete the installation.

Step 7: Verify the Updated Maps

After installation:

1. Restart your Furuno device.
2. Open chart information.
3. Confirm the new chart version.
4. Check important navigation areas.
5. Verify routes and waypoints.

Your updated charts should now be ready for navigation.

Tips for Downloading Furuno Map Updates Successfully

Follow these recommendations:

• Always download charts compatible with your exact model.
• Use a reliable SD card.
• Maintain stable internet during downloads.
• Keep a backup of navigation data.
• Update firmware before installing charts.
• Avoid removing the SD card during installation.
• Use official chart sources.

Common Furuno Map Download Problems

Download Fails or Stops

Possible causes:

• Weak internet connection
• Insufficient storage
• Corrupted download

Solutions:

• Restart the download.
• Free up storage space.
• Use a stable internet connection.

SD Card Not Recognized

Possible causes:

• Incorrect formatting
• Damaged card
• Unsupported capacity

Solutions:

• Reformat the SD card.
• Try another compatible card.
• Copy the files again.

Maps Not Showing After Installation

Possible causes:

• Incorrect chart files
• Missing license
• Installation error

Solutions:

• Verify chart compatibility.
• Reinstall the update.
• Confirm license activation.

Chart Update Error Message

Possible causes:

• Wrong update package
• Outdated firmware
• Corrupted chart files

Solutions:

• Download the correct chart version.
• Update Furuno software.
• Repeat installation.

Best Practices After Downloading Furuno Maps

After installing your new charts:

• Test GPS positioning.
• Review important routes.
• Confirm waypoint accuracy.
• Check harbor information.
• Verify navigation markers.
• Perform a short test voyage if possible.

Testing ensures your navigation system is ready before longer trips.

How Often Should You Download Furuno Map Updates?

Most users should check for new charts:

• Every 3–6 months
• Before boating season
• Before offshore trips
• Before long-distance cruising
• Whenever new chart releases become available

Commercial operators may require more frequent updates.

Frequently Asked Questions

Can I download Furuno map updates for free?

Some software updates may be free, but marine chart updates often depend on the chart provider, region, and licensing requirements.

What SD card should I use for Furuno map updates?

Use a reliable SD or microSD card that is compatible with your Furuno model and formatted according to the manufacturer's instructions.

Do Furuno map updates delete my saved routes?

Generally, chart updates do not remove routes or waypoints. However, backing up your navigation data before updating is recommended.

Why are my downloaded Furuno charts not working?

This can happen due to incorrect chart files, incompatible formats, missing licenses, or improper installation on the SD card.

Should I update firmware before downloading maps?

Yes. Keeping firmware updated improves compatibility and ensures your Furuno device works properly with newer chart releases.

Conclusion

Downloading the latest Furuno map update is an important part of maintaining accurate and reliable marine navigation. Updated charts provide current information about waterways, navigation aids, ports, and depth details, helping you plan safer routes. By identifying your Furuno model, downloading the correct chart files, preparing the SD card properly, and installing the update carefully, you can keep your navigation system accurate and dependable. Regular map updates combined with current firmware and routine maintenance will help ensure your Furuno GPS performs reliably on every voyage.