How Vision Aided Navigation Is Defining the Future of Flight

Vision-Aided Nav Offers a Glimpse of the Future

Inertial navigation is essential to aviation because it does an exceptional job of determining the position, velocity and attitude of a crewed or uncrewed aircraft. But even the most advanced inertial navigation system (INS) requires a second, independent source to maintain accuracy and precision over an extended period. 

For decades, global navigation satellite systems (GNSS) – commonly called GPS – have provided that independent information source for most aircraft, making GNSS/INS architectures the default standard throughout aviation. 

 But what happens when GNSS signals are blocked, intentionally jammed or spoofed by a nefarious source? That’s when the INS needs another independent data source to anchor performance so the system can continue to provide trusted position, velocity and timing data even in satellite-denied environments. 

Seeing the Future of Resilient Navigation 

The Honeywell Alternative Navigation Architecture (HANA)  is an advanced navigation framework designed to supplement INS when GNSS signals are degraded, jammed or otherwise unavailable. Honeywell is already advancing several promising technologies, including Vision-Aided Navigation  (VAN).

Honeywell VAN solutions are available today for military and commercial operators. 

VAN uses onboard cameras to observe the surrounding environment and detect visual features the system can track, such as landmarks, structures, and runways. The VAN software compares live camera images with stored maps, providing an absolute position fix that doesn’t drift over time.  

When fused with INS sensor data, VAN can eliminate INS drift over time, enhance accuracy and support safer, more precise operations in complex and contested environments – making this approach particularly valuable for crewed and uncrewed military aircraft.

Exploring the Full Potential of HANA 

Honeywell pioneered the use of VAN in military applications and is currently working on several high-profile programs to incorporate alternative navigation technologies for current and future defense platforms. Ready-now VAN solutions are setting the stage for the broader application of HANA across the aviation ecosystem. 

HANA’s framework supports a range of independent navigation sources and recognizes that no single alternative navigation solution is ideal in all situations. In addition to VAN, HANA solutions include:

• Magnetic anomaly–aided navigation – Leverages subtle variations in Earth’s magnetic field as a natural reference map. By comparing real-time magnetic measurements to known magnetic signatures, navigation systems can estimate aircraft position. Magnetic anomaly–aided navigation provides a passive, globally available aiding source that complements INS, and is particularly over maritime environments where vision is not available.
• Low Earth Orbit (LEO) satellite navigation – Uses signals from low-altitude satellite constellations that are typically stronger and more difficult to jam than traditional GNSS signals. These LEO-based signals can serve as an additional ranging and timing source, helping sustain navigation performance when conventional satellites are degraded or unavailable.
• Other future or supplementary sensors – Includes technologies such as radar, celestial or star tracking, and radio-based ranging. Each contributes unique motion or position cues depending on the operating environment, and all are designed to plug into the same fused architecture.