GPS jamming protection for high-security asset tracking. Protect better what matters

Every year, businesses lose billions in assets due to theft and GPS jamming, making traditional tracking systems unreliable. To stay ahead, you need more innovative security solutions. That’s why at Navixy, we’re constantly expanding our integrations so that you can access the latest anti-jamming technology instantly.

Smart devices can help change asset security for the better. Let's look at how they do it, using Suntech’s ST4410G tracker as an example.

The growing threat to asset security in logistics

According to recent reports (CargoNet, 2024), cargo theft is hitting record levels, with a 27% surge last year. Thieves are getting smarter, using GPS jammers to block tracking signals and make stolen shipments disappear without a trace. For logistics companies, that means losing valuable cargo and having no way to recover it.

The problem is many tracking solutions are easy to spot and disable. Once a device goes dark, so does any chance of stopping the theft in real time.

But let’s look at jamming in a bit more detail.

What’s GPS jamming? When GPS goes dark

GPS jamming happens when someone deliberately blocks GPS signals. These devices, often cheap and easy to hide, send out noise that overpowers the signal from satellites. As a result, tracking systems can’t report the vehicle’s location—giving thieves a window to act.

This method isn’t just theoretical—it’s used often. In Mexico, GPS jammers are involved in about 85% of cargo thefts, according to COTS Journal. And while U.S. figures are harder to pin down, law enforcement has reported several cases where thieves used jammers to disable trackers and vanish with the load.

The impact adds up. In 2023, there were 1,183 incidents of cargo theft in the U.S., with average losses of $586,917 per case. For high-value freight, just a few minutes of signal loss can be enough to lose a shipment entirely.

At Navixy, we always approach integrations with solving real problems in mind. When something promising hits the market, we strive to make it available to our users.

The device-side defense. How hardware manufacturers fight GPS jamming

So, how are hardware makers stepping up to stop jamming?

Let's say it’s a mix of smart signal detection, interference filtering, and backup tools that help the device stay online or at least raise a red flag—when it’s being tampered with. Here are some of the key features you’ll find in modern anti-jamming devices:

• Jamming detection. Devices keep a constant eye on GNSS signal quality. If they notice unusual interference—like a sudden drop or distortion—they flag it as a jamming event and send out an alert.
• Backup communication. Some models can switch to fallback methods like GSM triangulation when GPS gets knocked out.
• Better antennas and shielding. Upgraded hardware, including high-sensitivity antennas and protective shielding, helps reduce the impact of low-level jamming.
• Tamper and motion sensors. If the GPS signal fails, other sensors can still pick up signs of trouble—like sudden movement or someone trying to unplug or block the tracker.

Together, these tools create a solid first line of defense. They keep you informed, limit downtime, and give recovery teams a better chance of acting fast.

And that works.

Real-world protection in action

A Navixy customer, operating in a Latin American country with a high rate of cargo theft, implemented Suntech’s GPS devices equipped with jamming detection. Their logistics fleet was a frequent target for organised theft, often involving signal jammers designed to disable traditional trackers.

Thanks to the anti-jamming function, the devices detected interference almost instantly. The system sent automatic alerts to the monitoring team, including real-time event details and the last known location. This fast reaction allowed the company to quickly inform law enforcement and trigger safety protocols. In many cases, they managed to recover the vehicle and even prevent the theft altogether.

How it works. Enhancing cargo safety with anti-jamming solutions

While the previous case clearly shows the power of anti-jamming technology in action, it’s worth breaking down how these solutions actually function on the ground. And the best way to do that is a real-world device example.

Here, it will be Suntech ST4410G—the very device used by the Navixy customer mentioned above. Compact and packed with layered security features, it’s a strong showcase of how modern GPS hardware is evolving to outsmart interference and protect valuable assets.

Inside the Suntech ST4410G, and how Navixy brings out its best

The ST4410G is a compact, battery-powered GPS tracker built for tough conditions—think cargo containers, pallets, or mobile equipment where wiring is impossible. Running on CAT M1 with 2G fallback and equipped with a long-lasting lithium battery, it’s made for high-risk environments where flexibility and stealth matter.

The device’s built-in resilience against signal jamming makes it stand out, and Navixy takes those defences even further.

Built-in layers of protection

With jamming tactics on the rise—especially in cargo theft—the ST4410G doesn’t rely on just one line of defence. Instead, it offers a multi-layered approach.

• 433 MHz fallback – If GPS or GSM signals are jammed, the tracker automatically switches to 433 MHz OOK, allowing it to send location updates via LBS (Location-Based Services).
• Field-ready autonomy – Its rechargeable battery keeps the device running independently, even in remote or mobile setups—no external power needed.
• Slave-master redundancy – You can deploy several units in a slave-master setup. If one is tampered with or stops sending data, the others detect it and trigger alerts—ideal for protecting grouped assets or vehicle fleets.

How Navixy elevates these capabilities

The ST4410G’s hardware is powerful on its own. As mentioned, Navixy allows one to make full use of its key anti-jamming functionality.

How? Let’s figure out.

GPS fallback with NBR

When GPS is blocked, Navixy uses the device’s NBR (Neighbour Cell Report) frames to approximate location via nearby cell towers. This keeps your visibility intact, even in the middle of a jamming attempt.

Smart master-slave tools

Navixy lets you manage up to 10 slave units from one master. Map devices by serial number, configure presence checks, and set up real-time monitoring of movement or disconnection—all within an optimal 80–150 metre range.

Powerful alert automation

Stay ahead of problems by setting custom alerts for device absence, tampering, or distance breaches. Configure them manually or roll them out in bulk using Navixy’s API—ideal for scaling operations and reacting fast when something’s off.

Below, we'll look at all these in even more detail, so keep on reading.

NBR – smart backup for when GPS fails

One of the standout features of the ST4410G is its ability to maintain location visibility even when GPS signals are blocked. This is thanks to its support for NBR (Neighbor Cell Report)—a new kind of data frame that goes beyond the basics of fallback tracking. Besides GPS, the device collects and transmits cellular metadata from surrounding towers, such as signal strengths, area and network codes, and cell IDs. This information enables triangulation, allowing Navixy to approximate the device’s location even when GPS is jammed or unavailable.

Navixy has the ST4410G’s NBR frames integrated, which allows it to decode the data, visualise it, and make it actionable in real time. In practice, monitoring teams can continue tracking assets in challenging environments, including areas where jammers are in use, helping businesses transporting high-value cargo or operating in high-risk zones.

Master-slave configuration to enhance asset protection

The ST4410G GPS tracker offers a powerful asset protection solution with its master-slave configuration. This feature allows a single master device to monitor up to 10 slave devices, making it perfect for tracking multiple assets simultaneously. Such a setup provides real-time better protection against tampering or theft.

How the master-slave configuration works

In a master-slave configuration, one device acts as the master, while the others serve as slave devices. The master device is the central point of control, responsible for requesting presence updates from the slave devices. The slave devices are typically embedded in the assets being tracked, such as inside merchandise or vehicles.

The master device communicates with the slave devices by sending out Presence Message Requests (PMRs), asking for updates on their status. If any slave device is moved, tampered with, or disconnected, the master device detects the change and triggers an alert. This setup is particularly valuable for businesses that need to monitor high-value assets in transit.

For example, you can install the master device in a vehicle and place the slave devices in the cargo or merchandise being transported. If a slave device is moved or tampered with (due to theft, break-in, or unauthorized access), the system immediately detects the issue and alerts the operator, allowing for quick action.

Making the most of your devices with Navixy

You don’t need to be a tech expert to get powerful results from your tracking devices. Navixy helps you unlock their full potential—whether you're using master-slave setups like the ST4410G or managing a wider fleet.

Navixy lets you fine-tune important settings, such as how often devices check in and how long to wait before raising an alert—giving you better control over communication. It means fewer false alarms and no missed issues, saving you time, money, and peace of mind when tracking valuable assets.

Once everything’s set up, Navixy keeps a close watch in real time. If a device goes missing, moves where it shouldn’t, or comes back online, you might get notified instantly. Plus, you can monitor the distance between devices, which is a handy way to spot if assets get separated or tampered with before it becomes a bigger problem.

Everything is manageable through a user-friendly interface, and as your operation grows, Navixy scales with you. Use the API to automate bulk configurations and alerts, or take advantage of IoT Logic to combine multiple conditions—like movement and temperature—into smart rules that trigger exactly when you need them to.

Promoting security through smarter integration

Asset theft and GPS jamming are active threats modern logistics has to deal with. Hopefully, smarter devices and tech solutions that bring out their full potential keep developing to address these challenges and help businesses stay several steps ahead.

Navixy helps to make the most of advanced trackers like the Suntech ST4410G device, offering companies more control and better protection of their assets. From automatic jamming alerts to GPS fallback and real-time asset coordination, the result is a smarter, more responsive security system that protects operations where it matters most.

Want to explore how anti-jamming tech and Navixy integrations can strengthen your fleet or cargo logistics? Feel free to contact our team, and let’s start that conversation!