U.S. Army Tests GPS-Denied Navigation on Mach 5 Hypersonic Aircraft for Future Weapons.

The U.S. Army and General Dynamics Mission Systems have successfully demonstrated a compact GPS-denied navigation receiver aboard a Mach 5-capable hypersonic aircraft, advancing technology designed to keep future hypersonic missiles and precision-guided weapons on course when conventional GPS signals are disrupted or unavailable. Known as Multiple Orbit Navigation (MO-Nav), the receiver uses alternative satellite constellations and radio-frequency signals to support navigation in contested electromagnetic environments, addressing a critical vulnerability in long-range precision-strike operations.

Stratolaunch's Roc carrier aircraft carries the Mach 5-capable Talon-A hypersonic test vehicle, used to demonstrate the MO-Nav GPS-denied navigation receiver developed by General Dynamics Mission Systems. (Picture source: Stratolaunch)

General Dynamics Mission Systems recently announced that it conducted the demonstration in cooperation with the U.S. Army Combat Capabilities Development Command (DEVCOM) Aviation and Missile Center using Stratolaunch's reusable Talon-A hypersonic test aircraft. The flight represents an important step toward equipping high-speed weapons with more resilient navigation capabilities against electronic warfare, satellite interference, and deliberate GPS jamming.

The MO-Nav receiver is built around a compact, single-board circuit card assembly designed to process multiple sources of positioning, navigation, and timing information. Unlike conventional receivers that depend primarily on the U.S. GPS constellation, MO-Nav can exploit other Global Navigation Satellite Systems, commercially provided navigation services, and radio-frequency signals of opportunity. This approach is intended to reduce dependence on any single navigation source when GPS reception is degraded or denied.

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Reliable navigation is particularly important for hypersonic weapons, which travel at speeds exceeding Mach 5, approximately 6,100 kilometers per hour under representative atmospheric conditions. At these velocities, navigation data interruptions can complicate trajectory corrections, while electronic warfare threats may further degrade satellite-based positioning. Alternative navigation signals could therefore contribute to the resilience of hypersonic missiles operating against heavily defended targets.

The Talon-A flight allowed navigation electronics to be evaluated under demanding, high-speed conditions. The reusable hypersonic test aircraft can maneuver at Mach 5 or higher, providing flight environments relevant to future hypersonic weapons. General Dynamics has not disclosed the receiver's precise navigation accuracy, the duration of GPS-denied operation, the signals processed, or the level of electronic interference encountered. The demonstration should not yet be interpreted as proof of complete operational navigation capability under combat jamming conditions.

MO-Nav has also been demonstrated in a cannon-fired artillery application, where the receiver survived extreme launch acceleration and successfully supplied signal measurements to the munition's mission computer. This earlier test established its potential suitability for precision-guided artillery ammunition, whose electronic components must withstand severe mechanical stresses. Together, the artillery and hypersonic demonstrations indicate that the receiver architecture could support several categories of high-speed and high-acceleration weapons.

Another key feature is MO-Nav's software-defined architecture, which lets users update navigation and signal-processing functions without necessarily replacing the receiver hardware. This flexibility could let weapon manufacturers and military operators adapt to evolving electronic warfare threats while reducing the need for hardware modifications. The compact design also makes the receiver suitable for weapons with strict size, weight, and power limitations.

In its October 7, 2026, announcement, General Dynamics Mission Systems identified GPS-denied navigation as a major capability gap affecting U.S. joint forces. Matt Elliott, director of the company's Weapons and Navigation business segment, emphasized the growing pressure on weapons programs to incorporate GPS alternatives and maintain mission availability. According to Elliott, software-defined receivers could help military systems respond more rapidly to changing threats through software upgrades rather than repeated hardware replacement.

Building on MO-Nav, General Dynamics is developing the Multiple Orbit Highly Assured Weapons Kit (MOHAWK), an advanced receiver intended to provide greater frequency diversity, access to additional satellite constellations, and stronger protection against electronic jamming. MOHAWK is also designed to support military GPS M-Code reception, either through an integrated receiver or an external M-Code GPS receiver, with anti-jamming and anti-spoofing capabilities intended to strengthen navigation reliability in contested environments.

General Dynamics and DEVCOM Aviation and Missile Center are jointly investing in the next development phase, with a hypersonic MOHAWK demonstration incorporating integrated M-Code capability planned for 2027. Further demonstrations involving precision-guided munitions are scheduled for 2028. Although MO-Nav is already available for integration, MOHAWK's more advanced capabilities remain under development and require additional validation before operational adoption.

For the U.S. Army, this development addresses a vulnerability affecting modern precision-strike operations. Long-range artillery, guided missiles, and hypersonic weapons depend on accurate navigation to reach designated targets, while potential adversaries are expanding electronic warfare capabilities intended to interfere with satellite positioning. Compact receivers that can use alternative navigation signals could help preserve weapon effectiveness when conventional GPS becomes unreliable.

The demonstration also highlights the growing importance of navigation resilience in U.S. military modernization. As the Army pursues longer-range precision fires and advanced hypersonic weapons, survivable guidance electronics are becoming as important as propulsion, maneuverability, and terminal targeting. If subsequent MOHAWK demonstrations validate its accuracy and resistance to electronic attack, the technology could reduce dependence on conventional GPS and improve the reliability of future U.S. precision-guided weapons in high-intensity conflicts.

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Written by Alain Servaes – Chief Editor, Army Recognition Group
Alain Servaes is a former infantry non-commissioned officer and the founder of Army Recognition. With over 20 years in defense journalism, he provides expert analysis on military equipment, NATO operations, and the global defense industry.