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Alternative Navigation Systems

Critical Solutions for GPS Denied Environments

Honeywell is proud to introduce a multitude of alternative navigation offerings (e.g., vision, radar) to aid and augment availability, integrity, and performance of inertial navigation solutions to combat GPS disruptions.

Small Unmanned Aerial Services
(UAS)/Surface Vehicles

Large UAS/Military Aircraft

Delivering You An Edge

Maximum Performance – with multiple systems onboard for increased situational awareness.

Consistent Availability – Navigation is critical to flight; this solution makes sure you have navigation available when you need it most.

System Integrity – solution keeps you protected from spoofing and jamming so you can trust the integrity of what you are reading.

Unrivaled Size. Weight and Power – Solution has strong performance here compared to other systems.

Brochure  (2)
Brochure  (2)
Honeywell Alternative Navigation - Brochure
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Resilient Navigation Solutions - Infographic
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What is Alternative Navigation?

Alternative navigation systems use sensors such as cameras, LiDAR, radar, radios and star trackers to augment and/or aid inertial navigation systems. The intent of these systems is to provide corrections to inertial navigation systems in GNSS-denied environments. Simply put Alternative Navigation helps pilots or unmanned aerial vehicles navigate when the primary source isn’t working or is denied. 

Why We Need Alternatives to GNSS

Position and timing signals from global navigation satellite systems (GNSS) have become the primary source of navigation for vehicles across air, land and sea. GNSS has seen a significant increase in intentional and unintentional disruptions including jamming and spoofing. Unintentional disruptions, on the other hand, can be due to multi-path errors and are very common in urban environments. These disruptions can last from a few seconds to several hours. Hence, it is imperative to understand and partner with our customers to engineer alternatives to GNSS based navigation to improve performance in civilian and military applications.

Our Large UAS/Military Aircraft Portfolio


Honeywell’s Vision Aided Navigation system uses live camera feed (optical and/or IR) and compares it with maps to provide a passive un-jammable highly accurate absolute position. This was demonstrated on Embraer E170 and achieved a GPS like performance (i.e., horizontal position accuracy of 10m CEP50) during GPS denied conditions.


Honeywell’s Celestial Aided Navigation system utilizes star tracker to observe stars and Resident Space Objects (RSOs) to provide a passive un-jammable solution with GPS-like accuracy in GPS denied or spoofed conditions. This was recently demonstrated on a land vehicle and achieved an accuracy of 30m CEP50.


Honeywell’s Magnetic Anomaly Aided Navigation system measures earth’s magnetic strength and compares with magnetic maps to accurately identify the position of the vehicle. The technology was successfully demonstrated on Embraer E170 recently. 


Honeywell’s Radar Aided Navigation system uses radars to measure velocity and provide this information to INS. INS utilizes this information to improve its accuracy. Learn more:

Honeywell Compact Inertial Navigation System

Honeywell Radar Velocity System

How it Works – Layers of Protection

Going Beyond Inertial Navigation

One of the alternatives to GNSS is inertial navigation. Inertial navigation is based on the principle of “dead reckoning” and utilizes inertial sensors such as accelerometers, gyroscopes and magnetometers to get position, velocity and heading. One advantage of inertial navigation is that it can work in all environments. However, inertial navigation drift errors accumulate over time and if they’re not corrected, this can lead to large position and attitude errors. To correct these errors at regular intervals, we need GNSS signals. Therefore, inertial navigation is still dependent on GNSS and prolonged GNSS disruptions can make inertial navigation ineffective.

Small UAS Portfolio

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