The UK Hydrographic Office (UKHO) has taken an important step toward enhancing the United Kingdom’s Positioning, Navigation and Timing (PNT) infrastructure by hosting the first cross-government geodesy and PNT working group. Held in October 2025, the meeting brought together representatives from 19 government bodies to assess risks, dependencies, and opportunities for improving national PNT Resilience.
Why PNT Resilience Matters for National Infrastructure
PNT services are at the core of modern life. They guide ships and aircraft, power telecommunications, synchronise financial networks, support emergency response, and help maintain energy and transport systems. Most of these functions rely on satellite-based signals such as GNSS.
However, GNSS is vulnerable to disruption — from space weather and signal interference to cyber threats and technical failures. Any interruption could impact critical national services. The UKHO-led working group aims to strengthen understanding across government and coordinate strategies to protect these essential capabilities.
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Government Measures to Enhance PNT Resilience
The Department for Science, Innovation and Technology (DSIT) has outlined several new measures to improve national PNT reliability. These include expanding the GNSS Interference Monitoring Programme, enhancing the UK’s National Timing Centre, exploring terrestrial alternatives such as eLoran, and increasing situational awareness around PNT threats.
These interventions aim to diversify the UK’s PNT systems and reduce reliance on any single source. Together, they form a structured pathway toward long-term PNT Resilience, ensuring the nation is better protected against outages or disruptions.
UKHO’s Role in Shaping the Future of PNT
With deep expertise in geodesy — the science of measuring Earth’s shape and position — UKHO will support both defence and civil maritime communities by offering authoritative positioning and timing guidance. This ensures safer navigation in UK waters and strengthens the UK’s ability to maintain operational continuity even during PNT disturbances.
A Coordinated Path Forward
As risks to PNT continue to evolve, the UK’s unified approach demonstrates a shared understanding that these systems are essential national infrastructure. By bringing together government agencies, advancing alternative technologies, and enhancing monitoring capabilities, the UK is building a layered and robust system designed to protect critical services.
The latest cross-government collaboration marks a clear step toward securing the nation’s future through stronger, more reliable PNT Resilience.
Source: GOV.UK
