No audio available for this content.
by Irish Torres, SEO Specialist
Safran Navigation & Timing
Modern aviation runs on connection.
Aircraft swap data continuously, ground stations refresh in real time, and satellite navigation quietly underpins it all, providing the positioning and timing that pilots and systems have long taken for granted. For decades, the industry operated on a simple assumption: a connected system is a working system.
That assumption is cracking.
GNSS signals are under threat from jamming, spoofing and interference much more frequently than before, which was once a theory but is now part of the reality in some airspace regions. When a navigational system gets compromised, a signal becomes scary. A signal can lie. Worse, it can mislead with complete confidence.
This is why the conversation in aviation is quietly shifting away from connectivity and toward something harder to measure: integrity. Not whether a system is online, but whether it can be trusted. In a degraded environment, those are very different questions.
Connectivity Is Not Enough
Modern aviation systems rely heavily on each other. Flight planning and tracking, communications and airport operations are tightly connected through data flows that are synchronized and constantly updated.
GNSS acts as one of the fundamental components in such an architecture by supplying information about position and timing that is automatically trusted by many aviation systems.
However, while connectivity is essential in any aviation system, it is not enough for reliability.
This is where the industry’s traditional focus on availability begins to fall short. The next challenge is not simply keeping systems online, but making sure the information they rely on is valid.
The Shift from Failure to Deception
Conventional system thinking has long focused on failure modes: signal loss, equipment malfunction, or environmental disruption. These are visible, diagnosable and generally well understood.
GNSS interference introduces a different category of risk. Jamming removes access to the signal. Spoofing replaces it.
That distinction matters. A lost signal triggers alerts and fallback procedures. A deceptive signal can travel undetected through several interconnected systems until the discrepancies surface.
And there lies one of the hardest problems in contemporary navigation.
Demonstrating the Vulnerability
The case in point of an increased rate of GNSS interference in Europe showcases the speed at which navigation integrity may come into question in actual settings.
In 2025, aviation organizations reported a considerable increase in GPS jamming and spoofing around Eastern Europe and surrounding regions, with interference impacting navigation systems onboard airplanes and forcing pilots to navigate using alternative systems.
According to the European Union Aviation Safety Agency (EASA) and the International Air Transport Association (IATA), the frequency of interference around regions adjacent to conflicts is so significant that an overall solution to these issues becomes necessary.
From an operational perspective, this problem indicates that while planes can safely complete their routes, the trustworthiness of navigation sources cannot be taken for granted anymore, especially in regions experiencing electronic interference.
Integrity as a System Property
Navigation integrity refers to the ability of a system to provide a high level of confidence that the information it delivers is correct, or to warn when it is not.
In traditional aviation navigation, integrity often has been treated as an implicit outcome of system performance. However, in the current threat environment, it has to be consciously designed, monitored and consistently validated.
That is, moving away from passive acceptance of GNSS into conscious validation by comparison against other truths.
Inconsistencies between position information and other sensor inputs, such as inertial, radio navigation, or expected aircraft maneuvers, should be detected.
The objective is not just accuracy, but trustworthiness under uncertainty.
Why the Last Line of Defense Matters
When systems degrade, aviation always has relied on redundancy. Backup instruments, alternative procedures and trained human operators provide layers of protection.
But GNSS interference changes the nature of that redundancy.
In some scenarios, multiple systems may still appear operational, even while they are influenced by incorrect positioning or timing data. This reduces the effectiveness of traditional fallback logic because the problem is no longer the absence of data but the contamination of it.
That is why navigation integrity is increasingly viewed as a last line of defense. It is the layer that determines whether conflicting inputs can be detected before they propagate into operational decisions.
Building Trust
Modern resilience strategies are moving toward multi-source navigation architectures.
Rather than relying on a single input, systems increasingly combine:
■ Satellite navigation data (GNSS)
■ Inertial navigation systems (INS)
■ Ground-based radio navigation aids
■ Timing references from multiple sources
■ Environmental and motion consistency checks
The purpose is not to replace GNSS technology but to consistently verify its results.
In such a context, aerospace and defense firms like Safran are actively working on developing navigation security systems with the use of sensors, signal authentications and integrity monitoring methods that can prevent anomalies from escalating.
The Human Element of Integrity
Even the most advanced systems depend on interpretation.
Pilots, controllers and operators play a massive role in determining when something is amiss in terms of data. The training process has moved toward being able to detect the subtleties that are present, for example, inconsistency between different instrument readings, timing issues, or positional problems.
In other words, integrity takes on both a technological and cognitive meaning.
It is not only about what the system knows, but about how quickly humans and machines together recognize when something cannot be trusted.
A New Concept of Reliability
Up until now, the concept of reliability in aviation was about dependability, and things work as expected in the majority of situations.
This, however, is not enough in an environment where navigation may become contested.
Reliability now includes resilience under deception, degradation and uncertainty. It requires systems that can not only function, but also evaluate their own outputs in real time.
In this sense, navigation integrity becomes more than a feature. It becomes a boundary condition, defining when information is usable and when it is not.
Beyond the Link
As the industry becomes highly data-based and connected, there will be an increased reliance on GNSS and digital communications, along with a rise in the complexity of attacks against them.
The coming years will not be about having signals available but about having them genuine.
Because what lies even beyond the connection itself is this crucial question: Can the network still distinguish truth from illusion?
And in that distinction, navigation integrity is not just another layer of defense, but is the last one that matters.
Irish Torres writes about aerospace technologies, with a particular focus on resilient PNT, autonomy and critical infrastructure. Her articles have appeared in European aviation publications, where she provides insight into the technological challenges shaping the industry’s future.
