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Cargo tracking devices are essential for showing a shipper or any concerned party (whether internal or external) their cargo’s location. Through a combination of GPS, Wi-Fi, and cell, they’re able to pinpoint the cargo’s position throughout its journey. However, the manner in which these devices report that location is not always the same way in which they determine it. In other words, a device may calculate its location differently than how it tells a shipper where it is.
Understanding how these devices track and report data will help shippers choose the solution that best fits their needs. For that reason, here are the pros and cons of several reporting methods–and how Overhaul can work with them all.
3 different ways cargo tracking devices report location
Cell
Due to their wide availability, cell signals are a reliable, cheap way for tracking devices to report their location. They can also work in areas where GPS signals may be weak, such as densely populated cities, or areas without a clear view of the sky.
At the same time, cell signals often lack the accuracy of other reporting methods, like GPS. Interference from other devices, alongside network congestion, can make this problem even worse. Additionally, while cell signals are a boon in urban areas, they offer less reliable service out in the country where cell towers are less prominent. This is partially because cell networks were never set up for the intended purposes of accurately locating a device. The ability to use them in this capacity was an added benefit, as opposed to something optimized for this purpose.
In short, cell has the lowest impact on battery life, but the tradeoff is that it lacks accuracy. Although cellular signals can be an inexpensive and effective method for data reporting, using only cell is an incomplete solution.
Wi-Fi
Like with cell signals, Wi-Fi reporting is not always usable in more rural areas. Its data also tends to be more accurate than cell and less accurate than GPS. One way it stands out from both of these is in its police functionality.
When determining a location, many trackers will also scan and note Wi-Fi networks in range. They won’t store information concerning IP addresses, only the network’s name. It then uses a few publicly available databases and looks up those networks in there to determine a fixed location by triangulating signal strength to them. In cases involving stolen cargo, this information is more than enough to aid law enforcement.
For example, when Overhaul assists with a recovery, we have full control over the devices embedded in the stolen load, which enables easy data access. If a device has information stored about a nearby Wi-Fi network, we can send that information to police, who can then further narrow down the cargo’s location. Additionally, this network can be used as proof that the cargo is likely on a specific tractor trailer. In turn, this information can help police obtain a warrant to secure the stolen load.
GPS
As previously mentioned, GPS is usually more reliable out in the country than cell signals. It is also highly accurate, being able to provide location data within 10 feet of a shipment. Conversely, Wi-Fi tracking covers a 50-100 meter range, while cell signals can span anywhere from 500 to several thousand meters.
Although this list of benefits is notable, GPS devices are sometimes limited in other functionalities. They can also be less sustainable to produce and use long-term. Furthermore, these devices tend to drain battery far more quickly than cellular devices.
While GPS is a worthwhile investment for data reporting, it might not make sense as your only solution.
How to choose the right cargo tracking device for your company
While GPS offers the most accurate method of reporting, cell signals are often more readily available. Additionally, Wi-Fi can offer a unique function that can greatly aid shippers in cases of theft. Overall, it’s hard to say that one tracking device is better than the others. Rather, each device has worthwhile features, as well as limitations.
While it’s important to understand each device’s capabilities, what’s even more important is to understand your own needs. This is why choosing the right cargo tracking device requires an informed, consultative approach with a subject matter expert.
All of the devices Overhaul has tested and uses in our customers’ programs are capable of obtaining and reporting a shipment’s position using cell, Wi-Fi, and GPS technology. By working with us, you’ll have a better idea of how to integrate and utilize your devices to their fullest potential.
Reach out to learn more about how we can help with real time tracking and reporting today.
