Maritime sea trials of the HARLEQUIN quantum-hybrid inertial navigation system developed by CPI TMD have been successfully completed aboard the Trinity House vessel THV Galatea.
The trials were designed to test the operation of quantum-enabled sensing technology in real-world maritime conditions. The system aims to provide corrections for inertial drift using a cold-atom quantum accelerometer, to support navigation in environments where GNSS signals are unavailable or unreliable.
HARLEQUIN combines classical inertial navigation components with CPI TMD’s gMOT (grating magneto-optical trap)-based quantum accelerometer, developed in collaboration with the University of Strathclyde and Kelvin Nanotechnology under an Innovate UK-funded programme.
The trials were conducted during normal operations of THV Galatea, which carries out buoy maintenance, seabed surveys and marine infrastructure support.
“This sea trial is an important proof point for HARLEQUIN and for quantum systems more broadly,” said Dr Edward Boughton, Head of Applied Science, CPI EDB.
“Demonstrating stable performance on a real, working maritime platform shows that these technologies are maturing quickly and that they can reach the level of reliability needed for deployment in GNSS-denied settings.”
“It’s a clear indication that quantum inertial technology is moving from research to practical capability, and we’re excited to continue to work with our partners to accelerate that transition.”
CPI TMD said data from the trial will inform further system upgrades, with a second field trial planned for late 2026.
