Three recent trials in the United States, Australia, and the United Kingdom have shown that quantum systems can effectively support navigation and timing when GPS signals are unreliable or unavailable. These tests come amid growing concerns over the vulnerability of GPS to deliberate interference, such as jamming or spoofing. In the U.S., the Defense Innovation Unit successfully tested its MagNav program, a magnetic navigation system that improved location accuracy by 89% compared to older backup methods. The test involved an Embraer 170 aircraft flying over the Pacific Ocean, demonstrating the potential of quantum-based navigation in real-world conditions. In Australia, quantum computing company Q-CTRL conducted a maritime trial in the Coral Sea using a quantum gravimeter, a device that measures variations in gravitational fields to determine location. The test showed that the quantum gravimeter kept location errors within one nautical mile across the entire mission, outperforming conventional satellite backup systems by more than ten times. Q-CTRL's founder, Michael Biercuk, emphasized that the technology is now mature enough to support active defense operations, marking a significant step toward practical quantum navigation. Meanwhile, in the United Kingdom, Saab UK, in collaboration with Aquark Technologies and the Royal Navy, tested radar timing systems that functioned without relying on satellite signals. The test involved multiple Giraffe 1X radar units operating independently but maintaining a coherent air picture through quantum timing sources. Engineers intentionally introduced timing errors to simulate jamming conditions and confirmed that the network could recover once synchronization was restored. This trial highlights the potential for quantum timing to enhance military radar systems in contested environments. These trials occur against a backdrop of increasing satellite interference, with nearly 978,000 jamming events recorded globally in the first quarter of 2026, mostly in the Middle East. While the results suggest quantum navigation is moving closer to practical deployment, questions remain about whether it can fully replace GPS or simply serve as a backup during outages. Further testing and cost analysis will be essential to determine the full potential of quantum-based navigation systems.