GPS Jamming Map 2026: Where Signal Interference Is Happening Now

On March 26, 2026, GPS jamming disrupted navigation systems aboard more than 1,100 ships in the Middle East Gulf in a single day. That figure, reported by maritime analytics firm Windward, is not an anomaly. It is the new baseline. According to IATA's March 2026 safety report, reported GPS jamming events increased 67% in 2025 compared to 2023, while spoofing incidents rose 193% over the same period. FlySafe analysis shows that the geographic footprint of GNSS interference has expanded well beyond previously recognized hotspots, creating operational challenges for both aviation and maritime sectors worldwide.

This bulletin examines the current global GPS interference landscape, identifies the most affected flight information regions and sea routes, and outlines the practical steps operators should consider based on publicly available data.

Current Global Interference Zones: Where the Map Turns Red

The geography of GPS interference in 2026 is no longer confined to a handful of well-known areas. Based on publicly available NOTAMs, EASA Safety Information Bulletins, and crowdsourced pilot reports, the following regions exhibit persistent or recurring GNSS degradation.

Middle East and Persian Gulf

The Persian Gulf remains the most intensely affected zone globally. According to CNBC, vessels in the Persian Gulf have displayed location data indicating travel over land and sharp turns in polygonal paths — classic indicators of GPS spoofing. Windward's data confirms that on March 24, 2026, only four AIS-transmitting vessels crossed the Strait of Hormuz, with total transits running approximately one-third below typical volumes. AIS has become increasingly unreliable for monitoring traffic in the region, with tankers observed transiting without broadcasting position data.

Airspace status: FIRs covering the Persian Gulf, including Tehran (OIIX), Baghdad (ORBB), and Emirates (OMAE), have carried recurring NOTAM advisories regarding GNSS unreliability. The United Arab Emirates reported targeted GPS disruptions as early as March 9, 2026, with authorities describing the interference as unwarranted.

Affected routes: Overflights of the Strait of Hormuz corridor, approaches to Dubai (OMDB) and Abu Dhabi (OMAA), and maritime transit lanes through the Gulf of Oman.

Eastern Mediterranean and Black Sea

The eastern Mediterranean corridor — encompassing portions of the Nicosia (LCCC), Ankara (LTAA), and Damascus FIRs — has experienced sustained GNSS interference throughout 2025 and into 2026. IATA's data identifies this region as a primary hotspot alongside the Persian Gulf. Operators transiting between European and Gulf destinations via eastbound Mediterranean routes face the highest probability of encountering interference in this zone.

Baltic Region

The Baltic Sea has emerged as a significant and persistent interference zone. IATA's March 2026 report logs incidents across the Baltic, consistent with earlier documented disruptions during large-scale regional activities. As noted by Spire, previous events in the Baltic Sea region involved GNSS disruption affecting both maritime and aviation operations across multiple national FIRs, including Kaliningrad, portions of Warsaw (EPWW), and Stockholm (ESAA) FIRs.

Continental United States

GNSS interference is not exclusively an overseas phenomenon. IATA's safety report documented incidents over the continental United States, specifically near Denver International Airport (KDEN). Separately, a February 2026 analysis published in conflict on the Rocks noted that organized groups have employed jammers within the United States to disrupt the trucking industry. Low-cost GPS jammers remain widely accessible, with devices available for as little as $10, according to Spire's research.

South Asia

IATA's dataset also includes logged interference events in the South Asia region, though publicly available detail on specific FIRs and frequencies remains limited compared to the Middle East and European zones. Operators transiting Indian Ocean airspace should monitor applicable NOTAMs for the Mumbai (VABF) and Colombo (VCCF) FIRs.

Understanding What the Interference Looks Like

Not all GPS disruption manifests in the same way. A peer-reviewed study published in PMC identifies four primary categories of intentional GPS interference: barrage jamming, continuous wave (tone) jamming, chirp jamming, and protocol-aware jamming. Each varies in implementation difficulty and hardware requirements.

For operators interpreting a GPS jamming map in real time, the distinction between jamming and spoofing is critical.

Jamming involves transmitting a stronger signal on GPS frequency bands — L1 at 1575 MHz or L2 at 1227 MHz — to overpower the legitimate satellite signal. As explained by GPS World, this effectively creates a denial of service. A GPS receiver in a jammed environment will report signal loss or degraded accuracy. According to Geotab, a typical consumer-grade jammer generates interference over a 16-to-33-foot radius, but purpose-built systems can affect significantly larger areas.

Spoofing is more insidious. Rather than blocking the signal, a spoofer broadcasts a counterfeit GPS signal that a receiver accepts as genuine. The result: aircraft or vessels report positions that are subtly or dramatically wrong. Windward's observation of ships appearing to travel over land in the Persian Gulf is a textbook spoofing signature. NorthStandard's advisory on the topic notes that spoofing can be used to mask activity, reroute vessels, or create false position reports by exploiting vulnerabilities in unprotected navigation systems.

On real-time vessel tracking systems, spoofing typically appears as sudden position jumps, impossible ground speeds, tracks crossing over land masses, or geometric flight paths (circles, polygons) that no vessel or aircraft would actually fly. When multiple vessels in the same area simultaneously display identical anomalous positions, this is a strong indicator of area-wide spoofing rather than individual equipment failure.

What Operators Should Do: Aviation

IATA Director General Willie Walsh stated in March 2026 that "GNSS interference events are deeply concerning" and that "airlines rely on GNSS for safe and efficient flight operations." In response, IATA and EASA issued a joint action plan calling for standardized reporting procedures, real-time airspace monitoring, tighter device controls, and spoofing detection systems embedded in aircraft avionics.

The FAA published updated GPS/GNSS interference, jamming, and spoofing resources on March 23, 2026, as reported by NBAA.

Recommendation for flight operations:

• Review NOTAMs systematically for all FIRs along planned routes, with particular attention to the Persian Gulf, eastern Mediterranean, Baltic, and South Asia regions.
• Ensure IRS/INS alignment is verified before departure. Inertial reference systems provide GPS-independent navigation capability that becomes critical in interference zones.
• Brief crews on recognition of spoofing indicators: unexplained position shifts, navigation system disagreements, and sudden changes in computed wind data.
• Cross-reference multiple navigation sources. GPS World recommends sensor fusion — combining PNT data with onboard inertial measurement units (IMUs) — to identify inconsistencies including continual slight deviations in the signal.
• File and report all GNSS anomalies through the standardized reporting channels called for in the IATA-EASA joint action plan. Consistent reporting is the foundation of improved situational awareness industry-wide.
• Consider alternative routing where operationally feasible. Airlines have rerouted services to avoid the highest-risk corridors, particularly in the Persian Gulf and eastern Mediterranean.

What Operators Should Do: Maritime

Maritime operators face a compounding challenge: not only is GPS unreliable in key transit zones, but AIS — which itself depends on GPS for position data — degrades in tandem. Windward's analysis of the Strait of Hormuz describes a situation where AIS is increasingly unreliable for monitoring traffic.

Recommendation for maritime operations:

• Cross-reference GPS data with other terrestrial navigational aids, as advised by NorthStandard. Radar, visual bearings, and celestial navigation remain relevant backup methods.
• Update navigation system software and firmware to the latest security-patched versions. Outdated receivers are more vulnerable to both spoofing and protocol-aware jamming.
• Isolate navigation systems from external networks to reduce the interference event surface for GPS hacking attempts.
• Train bridge crews to recognize interference signatures and to transition to manual navigation procedures without delay.
• Monitor maritime authority advisories for the Strait of Hormuz, Persian Gulf, and other affected waterways.

Emerging Countermeasures and Detection Technology

The scale of the 2026 interference environment has accelerated development of detection and mitigation technologies.

Spire Global has demonstrated a space-based detection approach using low-Earth orbit satellites. Their method involves analyzing raw intermediate frequency (IF) data for anomalous activity in the GPS L1 band and false PRN broadcasts, using a hybrid time difference of arrival (TDOA) and frequency difference of arrival (FDOA) approach when multiple satellites simultaneously receive the signal of interest. Research has confirmed that multi-satellite interference monitoring is effective for accurately detecting and tracking GNSS interference sources.

On the mitigation side, GPS World highlights signals from LEO satellites — such as those operated by Iridium — as a promising complement to traditional GNSS. LEO signals are approximately 1,000 times stronger than GNSS signals and correspondingly more resistant to jamming, though they offer lower timing accuracy (80 nanoseconds versus GPS's sub-15 nanosecond precision). The use of encrypted signals, such as those provided through Inmarsat and Iridium-based services, adds a layer of spoofing resistance.

For fleet operators, telematics systems such as Geotab's can detect jamming events by monitoring for specific signal loss patterns, generating alerts labeled "GpsJammingDetected" in device logs. Even during active jamming, these systems continue to collect non-GPS data including engine telemetry, driver behavior, and diagnostic codes.

Key Takeaway

GPS interference in 2026 is not a localized or temporary phenomenon. It is a persistent, expanding operational reality spanning the Persian Gulf, the eastern Mediterranean, the Baltic, South Asia, and portions of the continental United States. IATA's data — a 67% increase in jamming and 193% increase in spoofing since 2023 — quantifies an acceleration that demands systematic operational responses rather than ad hoc workarounds.

FlySafe analysis shows that operators who integrate NOTAM monitoring, multi-source navigation cross-checks, and standardized interference reporting into their routine operations are best positioned to maintain safety margins in this environment. The joint IATA-EASA action plan provides a framework, but its effectiveness depends on consistent industry-wide adoption.

Analysis based on publicly available data only. FlySafe Research does not possess, access, or utilize any classified or non-public information. All sources cited are independently verifiable.

Frequently Asked Questions

Why aren't there red or green hexes on some parts of the map?

GPS interference maps rely on crowdsourced reports and automated sensor data. Areas with low air or maritime traffic density — such as open ocean regions or remote continental interiors — may lack sufficient data points to generate a reliability classification. The absence of color coding does not confirm the absence of interference; it indicates insufficient observational data.

I live in one of the red zones and my GPS was fine?

Consumer GPS devices (smartphones, car navigation) and aviation/maritime GNSS receivers operate at different sensitivity thresholds. A consumer device at ground level may function adequately during an interference event that significantly affects aircraft at altitude or vessels in open water. Interference can also be intermittent and highly directional, meaning its effects vary by location, time, and receiver characteristics within the same geographic zone.

What are the conflict zones where GPS jamming is regularly observed?

Based on publicly available NOTAMs and IATA reporting, persistent GNSS interference is regularly documented in the Persian Gulf (including the Strait of Hormuz corridor), the eastern Mediterranean, the Black Sea region, and the Baltic Sea. IATA has also logged incidents in South Asia and near Denver International Airport in the United States.

What does GPS spoofing look like on real-time vessel tracking systems?

Spoofing typically manifests as vessels appearing to travel over land, displaying impossible speeds, executing sharp geometric turns (polygonal paths), or multiple vessels simultaneously reporting identical incorrect positions. Windward documented these exact signatures among vessels in the Persian Gulf in March 2026. Any sudden, unexplained deviation in tracked position — particularly when consistent across multiple vessels — should be treated as a potential spoofing indicator.