Quantum Sensing, GPS Jamming, And The Race For Assured Navigation

Firgun Ventures is a VC firm investing in Series A/B quantum scale-ups globally.

Military platforms have grown steadily more capable of operating on their own, and yet almost every one still borrows its sense of the world from somewhere else. An uncrewed submarine can function autonomously for weeks. But it depends on external position, timing, and intelligence updates from Global Navigation Satellite Systems (GNSS) such as GPS to establish where it is, what time it is, and what is happening around it. That dependency is increasingly being tested at industrial scale, with roughly 978,000 GPS jamming and spoofing events recorded globally in the first quarter of 2026, 98% of them in the Middle East and more than 1,100 vessels affected. What looks like autonomy is often a borrowed independence, resting on infrastructure, such as global satellites, that an adversary can degrade for a fraction of the cost of the platform it disables. Furthermore, ownership is not immunity, because signals from a country's own satellites reach the ground faintly enough to be drowned out by cheap equipment, and the stations that control them sit at addresses anyone can look up.

Quantum clocks and sensors offer a route to moving part of that reference onto the platforms themselves. Quantum optical atomic clocks hold accurate time without satellite correction, cold-atom inertial quantum sensors measure motion from the wave-like behaviour of atoms chilled to near absolute zero, and quantum gravimeters read variations in the Earth's gravitational field. None of those measurements arrive from the outside, and that is the difference between decision autonomy, the ability to choose what to do, and reference autonomy, the ability to establish the physical facts a choice depends on. It is the second that quantum begins to address.

From Borrowed Independence To Reference Autonomy

A system that loses satellite navigation retains its ability to act but loses confidence in where it is. That confidence is what converts capability into a usable application. In December 2025, the Royal Navy and Imperial College London brought quantum-enhanced inertial sensors into the Arctic aboard MV Anvil Point and tested devices built for optical benches against the motion and vibration of a working ship. The UK has made this national policy through Mission 4 of its £2.5 billion ($3.4 billion) National Quantum Strategy, which commits to deploying quantum navigation systems on aircraft by 2030.

Similar undertakings have been carried out underwater, where satellite signals were never available to begin with. In October 2025, Infleqtion's Tiqker optical atomic clock became the first device of its kind to be operated at sea in an underwater vessel. The device was integrated into the Royal Navy's uncrewed testbed submarine XV Excalibur, supplying a local reference for navigation, sonar, and secure communications. The importance is that a platform carrying its own timing and inertial reference degrades more gradually when the external signal disappears, so that losing the network no longer functions as an immediate off-switch.

Why Resilient Platforms Point Towards More Distributed Military Forces

Reference autonomy attacks an asymmetry that favours the cheaper side, since a relatively inexpensive signal jammer can degrade significantly more costly military platforms by interfering with external GPS signals. Closing that gap forces an adversary to defeat additional layers of timing, sensing, navigation, and data fusion instead, shifting the economics of military operations.

The Defense Advanced Research Projects Agency’s (DARPA) Robust Optical Clock Network (ROCkN) programme shows how far the timing layer has travelled, developing a shoebox-sized clock that holds GPS-level timing for two weeks without a satellite update. This is being developed alongside a larger master clock intended to sustain a regional time reference for more than six months. That hardware has flown on fixed-wing aircraft, been integrated onto ground vehicles, and spent three weeks at sea aboard a naval vessel in the Pacific. DARPA is now attempting to move this capability towards production at scale. Its 2026 It’s About Time programme awarded IonQ a contract to establish an optical clock manufacturing pipeline, with a facility expected to open by mid-2027.

Volume matters because of what DARPA intends these clocks to do, linking this level of timing to distributed sensing, electronic warfare, and resilient communications rather than to riding out a single outage. Platforms that keep their own timing and navigation could operate with less frequent contact from external updates, turning networks from something that must continuously sustain every node into something that periodically coordinates systems capable of holding their own. The counterintuitive result would pair technological sophistication with operational decentralisation, so that the loss of a satellite or a command node would no longer propagate immediately to the edge. Furthermore, forces that stay coordinated while dispersed could begin to operate in environments where continuous connectivity has never been realistic before.

Quantum Sensing Relocates Dependency Rather Than Removing It

Gravity, magnetic fields, and locally measured motion can all be folded into a navigation solution, opening up underwater, underground, and contested environments where satellite signals were never dependable. Q-CTRL demonstrated the architecture in August 2026 in the Coral Sea off Australia's east coast, where its Ironstone Opal system used a quantum gravimeter to correct an inertial navigation system. The demonstration was conducted across an 83-kilometre route with no satellite input in the measurement chain, holding accuracy to one nautical mile and beating a navigation-grade inertial backup more than tenfold, according to Q-CTRL. The method works like a walker reading a contour map, fixing position by matching the ridges and valleys around them against the printed lines, except that the landscape here is the invisible variation in the Earth's gravity field.

The comparison also exposes the limitation, since a walker in this scenario would fail to navigate without a map. Substituting a physical reference for an external signal relocates dependence onto survey data, calibration, and the software matching one against the other. The shift in dependency turns environmental maps into strategic assets. Maps of that kind are accumulated slowly and in advance, so the advantage is being built now, through peacetime surveying rather than weapons procurement. Whether that knowledge has been folded into deployable navigation systems across national programmes globally is not something the open record can answer.

Hardware travels more easily than the capability it belongs to, since a country can buy a quantum sensor and still depend on another supplier for maps, calibration, and updates. NATO's Quantum Technologies Strategy helps the technology spread within the alliance and not beyond it, through common standards, interoperability, and national scrutiny of quantum supply chains. AUKUS goes further in some areas through the AUKUS Quantum Arrangement, focused initially on positioning, navigation, and timing and accompanied by export control reforms easing technology transfer between the three participants. The work will focus on navigation without using a GNSS. National technological independence is being exchanged in both cases for deeper alliance interdependence, which broadens access to resilience without equalising the ability to project power.

Quantum Is Redefining What Military Independence Means

Quantum sensing could drive a deeper and more consequential shift for defence. The technology is already shifting the dynamics from a contest over who can deny the network to whom, towards one over who keeps functioning once denial is assumed. Military platforms may grow in operational autonomy, but advancing the technology underpinning the platforms may rely on geopolitical blocs. The EU, for instance, has begun to address defence concerns using quantum technologies directly through ADEQUADE, a European Defence Fund project that ran to June 2026 and drew 31 partners from eight countries. Quantum will make platforms harder to blind and support forces that stay coordinated while dispersed. Whether that independence spreads widely or stays concentrated among major powers remains to be seen.