In a world where we’ve come to rely heavily on satellite navigation, a growing threat is casting a shadow over the maritime industry. Global Navigation Satellite Systems (GNSS), the backbone of modern positioning and navigation, are under siege from jamming and spoofing attacks. This isn’t just a theoretical concern; it’s a reality that’s already causing chaos in the skies and on the seas. Valerie Renaudin, a researcher at the University of Gustave Eiffel in France, has been delving into this issue, and her findings, published in the IEEE Journal of Indoor and Seamless Positioning and Navigation, are a wake-up call for the maritime sector.
Renaudin’s research paints a stark picture. GNSS attacks have surged sevenfold in contested regions, disrupting everything from commercial aviation to military operations. The problem has been exacerbated by the availability of inexpensive jammers, which can be acquired for less than $50. “The devices used by countries can be easily acquired by anyone,” Renaudin warns, highlighting the significant security implications.
The maritime industry is not immune to these threats. Renaudin’s investigation includes case studies of maritime spoofing in international waters, where vessels have been tricked into reporting false positions. This isn’t just a nuisance; it’s a serious safety concern that could lead to collisions or groundings. Moreover, the failure of precision weapons in active conflict zones due to GNSS interference underscores the potential for these attacks to escalate into full-blown crises.
But Renaudin’s research isn’t all doom and gloom. She argues that the future of secure navigation lies not in hardening satellite systems, but in making them optional. Indoor positioning technologies, originally developed for use in environments where GNSS signals are weak or non-existent, offer a promising alternative. These technologies, Renaudin suggests, could help mitigate GNSS attacks and solve outdoor navigation vulnerabilities.
For the maritime industry, this presents both a challenge and an opportunity. The challenge is to adapt to a world where GNSS can no longer be relied upon as the sole means of navigation. The opportunity lies in the development and implementation of alternative positioning technologies. This could open up new markets for maritime technology providers and create jobs in research and development.
Renaudin’s research is a call to action for the maritime industry. It’s time to wake up to the threat of GNSS interference and start exploring alternative navigation technologies. As Renaudin puts it, “The future of secure navigation lies not in hardening satellite systems, but in making them optional.” The maritime industry would do well to heed this advice.

