The Simrad RS40 is a modern VHF radio with built-in AIS receiver, GPS connectivity, and DSC (Digital Selective Calling). It’s widely used by boaters for safe communication and enhanced situational awareness. While the RS40 itself does not display navigation maps, it integrates with Simrad chartplotters and multifunction displays (MFDs) to provide accurate GPS and AIS data.
For this reason, users often look for a Simrad RS40 GPS update to ensure that the device and its connected systems are operating with the latest software and map data. This guide explains why updates are important, what you need, and how to update the RS40 and related navigation maps.
Performing a firmware/software update on the RS40 provides multiple benefits:
Improved GPS Positioning – Ensures accurate location data when transmitting DSC calls.
AIS Enhancements – Updates may improve target detection and display integration with chartplotters.
Safety Compliance – Keeps the radio up to date with international marine communication standards.
Bug Fixes & Stability – Eliminates issues reported in earlier versions.
Better Integration – Ensures smooth communication between the RS40 and Simrad chartplotters for map/GPS updates.
To update the RS40 and related maps, you’ll need:
Simrad RS40 Device – Installed and powered on.
microSD Card (8–32GB) – Formatted FAT32, for transferring firmware updates.
Computer with Internet Access – To download the update files.
Simrad Chartplotter (Optional) – If you want to update maps as well.
Active Chart Subscription – For C-MAP or Navionics updates on connected GPS devices.
Stable Power Supply – Prevents interruptions during update installation.
Visit the official Simrad Support page.
Search for RS40 in the product list.
Download the latest firmware update package.
Insert your microSD card into your computer.
Format it to FAT32.
Copy the update files to the root folder of the card.
The RS40 updates are typically installed through a compatible Simrad MFD (GO, NSS, NSO, or Cruise series).
Insert the microSD card into the MFD slot.
Power on both the MFD and the RS40.
From the MFD menu, go to Files > Updates.
Select the RS40 firmware update.
Confirm and allow installation to complete.
Restart the RS40 once the update finishes.
Go to Menu > Settings > About to verify the updated software version.
While the RS40 itself doesn’t store maps, your connected Simrad chartplotter does. To update its maps:
Log in to your Simrad account on the support website.
Download the latest C-MAP or Navionics chart updates.
Transfer files to a microSD card.
Insert the card into your Simrad chartplotter.
Install updates following the on-screen prompts.
This ensures that AIS data from the RS40 displays accurately on your updated marine charts.
Device Not Detected – Ensure the RS40 is powered and properly networked with the MFD.
Update Stuck – Restart the chartplotter and retry with a freshly formatted card.
File Errors – Re-download firmware from the official Simrad site.
microSD Issues – Use branded cards (SanDisk, Kingston) between 8–32GB.
Back up your waypoints and routes from the chartplotter before updating.
Always update the RS40 firmware and chartplotter maps together for best performance.
Perform updates before long voyages.
Check for updates every 3–6 months.
Use a stable power source to avoid failed updates.
Safe Communication – Ensures DSC calls transmit precise GPS coordinates.
Accurate AIS Overlay – Updated firmware improves AIS integration with chartplotters.
Reliable Navigation – Updated maps provide the latest marine data.
Peace of Mind – You’ll know your communication and navigation systems are fully up to date.
Longer Device Life – Updates extend the usability of both the RS40 and your chartplotter.
The Simrad RS40 is more than just a VHF radio—it’s a safety-critical device that works hand-in-hand with your GPS and chartplotter. While the RS40 itself does not store maps, keeping its firmware updated ensures accurate GPS data and AIS functionality.
For complete navigation reliability, update both the RS40 firmware and your chartplotter maps regularly. Doing so guarantees accurate communication, safe navigation, and an overall smoother boating experience.