The Looming Threat of GPS Denial and the Rise of Contested Navigation

For decades, the United States’ Global Positioning System (GPS) has been the invisible backbone of modern life, from military operations to civilian infrastructure. However, this reliance on GPS is increasingly precarious. A growing number of state and non-state actors are developing capabilities to disrupt, deceive, or deny GPS signals, forcing a shift towards contested navigation environments. This article examines the escalating threat of GPS denial, the vulnerabilities it exposes and the emerging strategies to maintain operational effectiveness in a world where GPS can no longer be taken for granted.

The Growing Threat of GPS Interference

GPS signals are inherently vulnerable to interference. Cheap jamming and spoofing technologies are now widely available, enabling adversaries with limited resources to disrupt navigation systems. Unclassified assessments from the intelligence community consistently warn that GPS jamming and spoofing are not isolated incidents, but rather persistent features of modern conflict. [1] Space-based radio frequency analytics routinely detect and geolocate global navigation satellite system interference, spanning regions from Eastern Europe to South America. [1]

The conflict in Ukraine has highlighted the tactical accessibility of GPS disruption. Backpack or vehicle-mounted jammers, built from readily available software-defined radios, are now commonplace, creating unpredictable navigation outages. [1] These tools require minimal training and can rapidly scale, extending the reach of GPS interference beyond traditional major-power conflicts.

GPS Denial as a Cyber-Physical Security Problem

GPS interference is not merely a signal anomaly; it’s a cyber-physical attack delivered through the antenna and receiver chain. In 2024, Ukraine publicly targeted a Black Sea offshore platform allegedly used by Russia for GPS spoofing, citing the hazard to civilian navigation. [1] Civil aviation advisories and reports reflect the scale and persistence of interference and spoofing across the Baltic Sea, Black Sea, and Eastern Mediterranean. Even within the United States, organized crime groups have employed GPS jammers to disrupt the trucking industry.

The Rise of Alternative Navigation Systems

Recognizing the vulnerabilities of GPS, various nations have invested in alternative Global Navigation Satellite Systems (GNSS). China’s BeiDou Navigation Satellite System (BDS) is the most significant competitor to GPS, and is now considered by some to surpass GPS in capabilities. [3] As of February 2026, BeiDou is a fully operational, global system with a constellation of 35 satellites. [1] Other GNSS systems include Europe’s Galileo, Russia’s GLONASS, and India’s NavIC.

However, these alternative systems are not without limitations. Quantum sensors, magnetic navigation, and gravity-based navigation each address specific failure modes but lack the scalability and robustness required for sustained, cross-domain operations under active denial. [1]

Contested Autonomy: A Path Forward

A promising approach to mitigating the risks of GPS denial is “contested autonomy.” This strategy emphasizes the development of navigation systems that can continue functioning even when GPS, communications, and vision are intermittent or unavailable. Instead of relying on a single sensor or fragile signal, systems fuse multiple imperfect cues – including inertial measurement units, vehicle dynamics, and opportunistic environmental information – through software-driven estimation. [1]

This approach treats navigation interference as a cyber-physical attack, focusing on software and estimation rather than a hardware arms race. It is scalable across multiple platforms and domains, suitable for both high-end aircraft and attritable systems.

Key Takeaways

• GPS is increasingly vulnerable to interference and denial from a range of actors.
• Alternative GNSS systems like BeiDou are emerging, but none currently offer a universal solution.
• “Contested autonomy,” which relies on fusing multiple sensors and software-driven estimation, is a promising strategy for maintaining operational effectiveness in GPS-denied environments.
• Adapting to GPS denial requires changes to requirements, testing, and acquisition processes.

The Future of Navigation

The era of unquestioned GPS dominance is over. The future of navigation lies in resilient, adaptable systems that can operate effectively in contested environments. Prioritizing contested autonomy, investing in software-defined solutions, and embracing a multi-sensor approach are crucial steps towards ensuring continued operational effectiveness in a world where signals can no longer be assumed.