Navigation System

Optimized for
Tactical Airborne

NavGuard is a mission critical real-time optical navigation system for tactical airborne platforms where size, weight and power are vital parameters.

NavGuard was designed to solve UAV safety and reliability issues generated from limited GNSS service. Current UAV architectures depend on the availability of GNSS service for many mission critical elements. Therefore, the lack of GNSS service immediately disables most commercial drones, rendering them useless.

NavGuard enables seamless, accurate and autonomous airborne GNSS-free navigation in areas where GNSS signal is spoofed, jammed or unavailable, making it the optimal solution to complement tactical UAV architecture, where payload capacity and flight time are limited and continuous positioning is crucial.

Outmaneuvering today’s navigation challenges

No GNSS. Game Over!

Despite being a vital module for global orientation and navigation, GNSS is easy to block and spoof. GNSS interruptions are increasingly common around the world from a simple but very effective electronic warfare tool to EMI interferences which disrupt and disable aerial platform operations. GNSS interruptions severely reduce navigation reliability. A case in point: Many UAVs struggle to operate, even for short periods of time, without a valid GNSS service, leading to aborted missions or even a platform crash or loss, endangering human lives, resulting in capital loss and in some cases third party lawsuits.

Current Solutions Simply Don’t Cut It

Many of the current solutions in the field of GNSS systems, designed to tackle this threat, are complicated, heavy, high power consuming, costly, and highly export regulated.

Inertial navigation: Although a valid solution capable of replacing GNSS to some extent, will eventually drift, making it a very time limited solution. The longer the time, the more costly and heavy the unit will be. This fact renders INS solutions impractical as a primary navigation instrument for tactical aerial platforms – manned or unmanned – making them to more of a supporting element, gapping shortterm
GNSS loss.

SLAM systems generate ever increasing position errors (drifts) that highly depend on the terrain and UAV dynamics. This also makes them a supporting solution rather than a primary one.


The most compact, lightweight, low power system available today
NavGuard’s compact architecture is ideal for tactical UAVs, such as small drones and quadcopters, where payload capacity and flight time are very limited and size, weight and power consumption are key success parameters. NavGuard’s solution is housed in a completely self-sustained system incorporating both a computing module and cameras in a single small size, lightweight and low power system. This architecture makes the system very simple to integrate and highly resistant to external interferences.

Small Size
Compact and

Low Weight
As low as 90g

Low power
consumption –
as low as 4W

High Accuracy –

All Weather, 24/7

High Frequency
coordinate update

precision takeoff
and landing

Cannot be
interrupted or

Full Control over the
system via API


Optional ATR
and other image

Can be integrated
into commercial and
industrial drones of
all sizes

Standard data
interface – common
GNSS serial interface

Geo-referencing Optical

Navigation System (GRONS)

The only technology able to serve as
a true GNSS replacement for airborne

The NavGuard system is based on real-time Geo-Referencing of optical video stream to an on-board Geo Infrastructure that generates a stream of low latency accurate positioning data similar in nature to the data structure of GNSS messages.
Live imagery frames taken from an on-board camera are digitally and continuously compared to an aerial Orthophoto and referenced to define a correlation between the two – thus associating the map’s grid to the image, allowing the extraction of continuous, accurate Pixel Coordinates. By doing so in real-time, image-based elements are given global coordinates that are absolute. This in turn generates a real-time low latency, accurate and drift-free navigation solution, which is critical, due to the dynamical nature of any Airborne platform.

Unlike other navigation solutions, NavGuard cannot be interrupted or jammed as it is not required to communicate with external sources or systems. The system attached to the Airbone contains all the SW, HW, Optics, firmware, algorithm, and calculation modules needed to generate the navigation solution. Moreover, its navigation solution is drift free and highly accurate – making it the only relevant technology able to serve as a true GNSS replacement. This becomes even more important as global regulatory agencies such as the US FAA requires navigational robustness, of Airborne platforms in general and drones in particular, that rely on orthogonal navigation technologies and a redundant navigation capability second to the GNSS. The NavGuard system gives exactly that. 

Asio Technologies

NavGuard is the latest solution from Asio Technologies. Asio Technologies specializes in geo-spatial position systems, navigation, situation awareness systems and capabilities, accurate AR and VR solutions and tactical mission planning and management. Asio’s solutions are based on years of true operational experience ranging from land-based navigation & north-finding, electro-optical design, real time sensors fusion and augmentation technologies. The Company has several innovative registered patents in the fields of positioning and north finding. Asio also brings a track record in manufacturing and supply of dozens of field-proven innovative solutions deployed by the thousands according to strict industry standards.