OFFSET PNT Signal | 02 June 2026
Source: Resilient Navigation and Timing Foundation (RNTF) via LinkedIn, citing Tovima/Reuters reporting, 26 May 2026. Original post by the Resilient Navigation and Timing Foundation.
The Signal
Lithuania’s communications regulator has formally warned that Russia has expanded its GPS spoofing infrastructure in Kaliningrad to a scale that now constitutes a persistent, systemic threat to navigation systems across a broad swath of Europe — not the occasional, localized disruption that characterized the threat picture as recently as 2023.
The key data point: Russia has increased the number of GPS spoofing antennas in Kaliningrad from 3 at the start of 2025 to 36 today — a 12x expansion in approximately 18 months. The effective spoofing radius from those antennas now reaches 450 kilometers beyond Lithuania’s borders, covering all three Baltic states (Lithuania, Latvia, Estonia), most of Poland, and portions of Finland, Sweden, and Belarus, as well as significant sections of the Baltic Sea.
Darius Kuliesius, deputy head of Lithuania’s communications regulator, described the shift in unambiguous terms: “The occasional interference began with the 2023 NATO summit in Vilnius. Now they have built up the infrastructure and the interference has become systemic, permanent, unending Russian provocation against European security.”
What Spoofing Is — and Why It’s Worse Than Jamming
The distinction between GPS jamming and GPS spoofing is operationally critical and frequently conflated in public reporting.
Jamming denies the signal. Navigation systems lose GPS lock, alert the operator, and fall back to alternative navigation. The failure mode is visible and, in most cases, manageable.
Spoofing delivers false position and timing data that downstream systems treat as authoritative. The navigation system does not alert the operator — it reports a confident, plausible position that is simply wrong. Aircraft, ships, and ground vehicles can be directed off course without any indication of a fault. Timing systems that synchronize financial networks, power grids, and communications infrastructure can be fed false timestamps without triggering alarms.
The RNTF’s framing is precise: spoofing is “hazardously misleading information” that “can result in tragedy.” The Lithuanian regulator’s data suggests that this hazard now covers a continuous geographic zone encompassing some of the most aviation- and maritime-dense airspace and sea lanes in Europe.
Documented Incidents
The 450 km figure is not theoretical. The following incidents have been publicly confirmed or reported in the Baltic spoofing zone:
| Date | Incident | Platform |
|---|---|---|
| 2025 | Spanish military aircraft carrying Defense Minister Margarita Robles | Fixed-wing, military |
| 2025 | Flight carrying European Commission President Ursula von der Leyen (en route to Bulgaria) | Fixed-wing, VIP transport |
| Ongoing | ADS-B aviation surveillance disruptions across Baltic states | Civilian aviation tracking |
| Ongoing | Mobile network degradation near Kaliningrad border | Cellular infrastructure |
| Ongoing | Online bus tracking failure in Klaipėda (~50 km from Kaliningrad) | Municipal transit systems |
The Klaipėda bus tracking case is particularly illustrative: it demonstrates that the spoofing signal is strong enough and persistent enough to disrupt civilian location services in a city 50 kilometers from the source — not a border zone anomaly, but a routine urban infrastructure failure.
The Timing Correlation
Lithuanian officials note that GPS disruptions intensify during Ukrainian drone attacks on Russian territory. This correlation suggests the spoofing infrastructure serves a dual purpose: it is both a persistent area-denial tool against NATO navigation systems and an active electronic countermeasure deployed in response to specific operational events. The implication is that the 450 km radius represents a baseline capability, not a maximum — and that the system can be surged.
The Broader PNT Context
This development does not occur in isolation. The week of 26 May 2026 produced a cluster of PNT-related signals that, taken together, describe an accelerating threat environment:
- 26 May: Lithuania’s 450 km spoofing warning (this report)
- 27 May: UK Defence Minister’s aircraft jammed again in northern European airspace (BBC)
- 28 May: Spirent’s Jeremy Bennington publishes analysis arguing GPS NOTAMs are insufficient for aviation safety
- 29 May: HASC FY27 NDAA markup proposes single PNT overseer for DoD (previously covered on OFFSET)
- 30 May: Congressional hearing on U.S. PNT capabilities scheduled for 4 June
- 31 May: RNTF President Dana Goward publishes “Munich 9 Years On: Same Message, More Urgency” in Inside GNSS
The pattern is not coincidental. The threat environment is generating the policy response — but the policy response, as the HASC provision and the congressional hearing both illustrate, is still at the governance and oversight stage. The gap between the threat timeline and the capability response timeline remains wide.
Implications for Defense and Critical Infrastructure Operators
For defense operators in the Baltic theater: The 450 km spoofing zone now covers the entire eastern NATO flank from the Baltic Sea to the Polish-Belarusian border. Any platform, system, or mission that relies on GPS for navigation, timing, or targeting in this zone must be treated as operating in a GPS-denied or GPS-degraded environment by default. This is not a contingency planning assumption — it is the baseline.
For aviation and maritime operators: Modern commercial aircraft carry multiple navigation systems and can operate safely without GPS. However, the ADS-B surveillance system — which air traffic control uses to track aircraft positions — is GPS-dependent and is being actively disrupted. The safety margin is narrower than the “aircraft can still fly” framing suggests.
For critical infrastructure operators: The timing dimension of GPS spoofing is underreported. Financial networks, power grid synchronization, and telecommunications systems that use GPS-derived timing signals are exposed to false timestamp injection across the entire affected zone. The failure mode is subtle and may not be immediately detectable.
For PNT technology vendors: The 12x antenna expansion in 18 months is a procurement signal. European governments are now facing documented, persistent, wide-area spoofing that their current navigation infrastructure was not designed to resist. The market for GPS-independent navigation, spoofing detection, and alternative PNT (eLoran, fiber timing, inertial navigation, Galileo authentication) is moving from advocacy to operational necessity.
What to Watch
- Lithuanian regulator follow-on reporting: Kuliesius indicated the regulator is tracking the antenna count and interference range on an ongoing basis. Further expansion of the Kaliningrad spoofing infrastructure would be a significant escalation signal.
- ICAO and EASA response: International aviation bodies have been slow to mandate spoofing-resilient navigation. The accumulation of high-profile incidents involving government aircraft may accelerate regulatory action.
- Galileo OSNMA deployment: The EU’s Galileo Open Service Navigation Message Authentication (OSNMA) feature, which allows receivers to verify signal authenticity, is in deployment. Adoption timelines and receiver compatibility are the critical path.
- NATO electronic warfare posture in the Baltic: The spoofing infrastructure expansion is a capability investment that NATO has observed in real time. The alliance’s electronic warfare response — including potential counter-spoofing measures — is not publicly documented but is presumably active.
- U.S. FY27 NDAA PNT provisions: The HASC markup and the 4 June congressional hearing are the legislative track for U.S. PNT governance reform. European spoofing developments will be cited as evidence in that debate.
Sources: Tovima, “Lithuania Warns Russia Can Spoof GPS Across Europe” (26 May 2026); Reuters, “Russia can falsify GPS signals deep into Europe, Lithuania says” (26 May 2026); RNTF newsroom (rntfnd.org); Resilient Navigation and Timing Foundation LinkedIn post (26 May 2026). Related OFFSET coverage: “Congress Moves to Fix GPS Governance — But the Harder Problem Remains Unsolved” (Topic 172).