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Australian Navy Tests Gravity Navigation to Replace GPS in Critical Scenarios

Published on 16/07/2025 at 11:20
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With GPS Signals Increasingly Vulnerable to Counterfeiting and Interruptions, the Australian Navy Tested a New Technology That Promises to Completely Change the Way Ships Navigate at Sea

The Australian Navy has completed a field test with an innovative technology that could change the way ships navigate in the sea. The experiment, conducted aboard the MV Sycamore, tested gravity-based quantum navigation sensors developed by the company AQ-CTRL.

The main goal is to provide a safe and reliable alternative to GPS, which has been suffering from counterfeiting and interruptions in different regions of the world.

Navigation Without Relying on GPS

The test involved a dual quantum gravimeter, a device capable of detecting small variations in Earth’s gravitational field.

This type of measurement acts as a kind of “gravitational compass,” which allows for identifying the position of a vessel even without GPS signal.

The CEO of Q-CTRL, Michael J. Biercuk, explained that, unlike other previous attempts to use quantum sensors, the company’s differentiator is its focus on software.

Operating on a real moving vehicle is not the same as conducting a scientific experiment. At Q-CTRL, we have taken a different approach to bring quantum sensors out of the lab, focusing on software as the critical enabler of performance in the real world,” stated Biercuk.

Open Water and Real Operation Tests

During the test, the sensor operated for 144 uninterrupted hours without any human interference.

It was installed inside a server rack, located in the communications room of the MV Sycamore. The installation required little energy: only 180 W, less than the consumption of a common toaster.

The technology was subjected to intense vibrations and the constant movement of the vessel. Still, it managed to record useful data and operate effectively, overcoming common limitations in other scientific tests.

The robustness of the software allowed operations to continue even when conventional techniques failed in the adverse conditions of the maritime environment.

A New Path in the Face of GPS Denial

The interruption or counterfeiting of GPS signals has caused significant losses.

In the United States, brief interruptions are estimated to generate losses of over one billion dollars per day. Additionally, there are direct impacts on commercial aviation and global maritime operations.

A recent case, which began on June 23, revealed the severity of the problem.

Ships navigating in waterways of the Middle East faced false signals, which compromised collision avoidance systems and exposed serious flaws in navigation safety.

The adoption of gravimetric navigation emerges as a practical and safe response. By not relying on external signals, such as those from GPS, this technology avoids interference and enhances the reliability of navigation in strategic and risky scenarios.

Quantum Sensors Gain Prominence

The use of quantum sensors outside of laboratories is one of the major promises for the defense sector.

Jean-Francois Bobier, Vice President of Deep Tech at the Boston Consulting Group, stated that the global quantum detection market could reach between US$ 3.3 billion and US$ 5 billion by 2030.

According to Bobier, “especially amid increasing cases of GPS denial, field-validated quantum sensors are more important than ever for navigation safety.”

These sensors operate by observing changes in the Earth’s gravity. The system compares the received data with known gravitational maps, similar to how a person uses landmarks on a map.

Thus, even without a GPS signal, it is possible to identify the position accurately and continuously.

A Benchmark for Real-World Applications

The project developed by Q-CTRL stands out for being implemented in just 14 months, from creation to deployment at sea. This demonstrates progress in terms of agility and operational feasibility.

Moreover, the system developed by the company is compact and efficient.

By achieving records in size, weight, and energy consumption, the sensor is shown to be compatible with use on real vessels and ready for defense missions.

The Royal Australian Navy was able to closely monitor the performance of this technology in a practical situation. The system needed to operate autonomously, without any external support, just as would be required in a real mission.

The gravity-based navigation, validated by Q-CTRL in partnership with the Australian Navy, represents a promising solution to a problem that affects military and civilian operations worldwide.

With quantum sensors increasingly adapted for use outside laboratories, a new safety standard is emerging, especially in environments where GPS proves unstable, ineffective, or compromised.

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Fabio Lucas Carvalho

Journalist specializing in a wide variety of topics, such as cars, technology, politics, naval industry, geopolitics, renewable energy, and economics. Active since 2015, with prominent publications on major news portals. My background in Information Technology Management from Faculdade de Petrolina (Facape) adds a unique technical perspective to my analyses and reports. With over 10,000 articles published in renowned outlets, I always aim to provide detailed information and relevant insights for the reader.

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