IN Brief:
- A 4 November UK procurement notice names the University of Strathclyde for Project Lodestone, valued at £304,167 excluding VAT.
- The work concerns development and sea trials of a second-generation quantum magnetic navigation sensor, distinct from inertial accelerometer trials.
- The notice gives a future signature date of 16 November and an expected contract period from 17 November 2026 to 18 November 2027.
The Ministry of Defence has named the University of Strathclyde as its intended supplier for Project Lodestone, a £304,167 programme to accelerate the development and sea trial of a second-generation quantum magnetic navigation sensor. The 4 November procurement notice records a future contract signature rather than a completed agreement.
The public notice describes a direct-award process and names the Glasgow university as the intended supplier. It gives a value of £304,167 excluding VAT, or £365,000.40 including VAT, but contains no sensor specification, trial vessel, navigation accuracy requirement, or published acceptance criteria. The notice is listed as an award transparency record with its award status pending, rather than evidence of an executed contract.
The stated future signature date is 16 November 2026, with a proposed service period from 17 November 2026 to 18 November 2027. A further year could be added if deliverables are delayed. These dates are planned procurement milestones; they do not show that sensor manufacturing or sea trials have begun.
Quantum magnetic navigation is one of several approaches being investigated to reduce dependence on signals from global navigation satellite systems, or GNSS. Satellite-derived positioning can be interrupted by jamming, deceived by spoofing, or unavailable beneath the sea surface. A passive magnetic system measures the local field instead of relying on a radio signal broadcast from space.
Geological structures produce local variations in the Earth’s magnetic field. If suitable reference maps exist, a navigation system can compare live field measurements with expected patterns to help estimate its position. Quantum magnetometers can measure very small field changes, but a useful navigation solution also depends on sensor calibration, map resolution, and reliable matching algorithms.
This distinguishes magnetic navigation from the inertial approach, which calculates changes in position from measured acceleration and rotation. An inertial system can continue from a known starting position without external signals but accumulates error as its measurements are integrated over time. Magnetic observations may provide an additional reference, while requiring their own processing and an adequately characterised magnetic environment.
Magnetic measurements become harder aboard a ship because its structure, electrical machinery, and operating equipment generate or distort local fields. Manoeuvring and wave motion change the sensor’s position and orientation while engines, motors, and electrical loads introduce time-varying interference. A field measurement therefore cannot be treated as a position fix without calibration and processing that distinguish environmental features from the vessel’s own magnetic signature.
A maritime trial would need to test repeatability against a known route and account for those changing interference conditions. It may also need to combine field measurements with inertial data or other navigation references, although the Lodestone notice does not specify a fusion architecture. The accessible procurement information offers no accuracy target or evidence of successful performance at sea.
The Royal Navy has separately tested magnetic sensors with the University of Sussex. Trials reported in October 2025 used optically pumped magnetometers at sea to measure variations in the Earth’s magnetic field. That earlier research establishes naval interest in the measurement technique but is not a completed milestone under Project Lodestone.
Sussex’s work also illustrates a distinction between observing magnetic anomalies and deriving navigation from them. Measurement quality, reference mapping, and compensation for the vessel’s own fields affect the value of any position estimate. The published material does not establish that the same sensor or software will be used in the proposed Strathclyde work.
Strathclyde has reported a separate sea trial involving HARLEQUIN, a cold-atom navigation demonstrator combining quantum acceleration measurement with conventional equipment. The university described that work in December 2025 following testing aboard the maintenance vessel Galatea with partners including CPI TMD, Covesion, and Trinity House. HARLEQUIN is not the magnetic sensor named in the November 2026 Lodestone notice.
An accelerometer measures motion, while a magnetometer measures magnetic field strength. Inertial navigation can run without external radio signals but accumulates positional error over time; matching magnetic measurements to a geophysical map offers a different possible source of correction. The two approaches should not be conflated merely because both can draw on quantum sensing technology.
Other research into naval positioning, navigation, and timing includes inertial sensors and precise clocks. Each tackles a different technical constraint: tracking motion, estimating location against an external reference, or maintaining timing. The Lodestone notice identifies magnetic sensor development and a trial at sea, without specifying an operational architecture that combines these technologies.
The sensor would have to operate amid changing weather, sea state, and machinery loads while maintaining calibrated measurements. A trial programme could compare measurements across repeated tracks to identify how consistently local field patterns can be detected. The Lodestone requirement does not specify the planned test methodology, the sensor mounting, or whether magnetic observations will be combined with an existing shipboard navigation system.
No quantified navigation performance, trial platform, or environmental qualification requirement is disclosed. A successful sensor demonstration would still need to show whether field patterns are sufficiently distinctive in the trial area and whether compensation for ship-generated interference can be maintained as operating conditions change. Until results are published, possible resilience to satellite-navigation disruption remains a research objective.
The next dated procurement milestone is the proposed contract signature on 16 November. If the agreement is executed, the programme is scheduled to run from 17 November 2026 to 18 November 2027, subject to the permitted extension. The current documented development is the intended university supplier, research requirement, value, and planned timetable.
