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With the increase in electromagnetic interference and the growing risk of GNSS signal falsification, precise satellite positioning is no longer a matter of comfort, but of safety. This is the background to the OneFix, a new GNSS sensor for boaters, combining multi-constellation reception, dual-band technology and a connected interface . Suggested retail price 395 ? EXCL. TAX this new model offers an attractive features/price ratio for pleasure craft.
Navigating in disturbed areas: the real threat of GNSS interference
Intentional and unintentional jamming, as well as spoofing attacks, are on the increase. In the Baltic Sea and the Mediterranean, a number of incidents involving cargo and commercial vessels have highlighted the vulnerability of GNSS signals. For a yachtsman, a drift of a few hundred meters can be critical, particularly when navigating along the coast or near restricted areas. OneFix offers a response to these risks by cross-referencing signals from five satellite networks (GPS, Galileo, Beidou, NavIC, and optionally Glonass) and analyzing deviations to generate alerts in the event of anomalies.
The technical contribution of the dual-band GNSS receiver: L1 and L5
Most conventional GNSS receivers use only the L1 band, which is sufficient under ideal conditions. But the more recent L5 band offers greater resistance to reflections and disturbances, particularly in urban or coastal environments. By coupling L1 and L5, OneFix achieves sub-meter accuracy, useful for tight moorings, regattas or navigation close to obstacles. The antenna supplied is a high-gain dual-band model, designed to maximize reception quality, even in rough seas.
Anti-spoofing: how the OneFix algorithm secures your position
The heart of the system is the position verification algorithm. It compares data from different constellations and frequency bands in real time, identifies inconsistencies and warns of suspicious signals. These functions are crucial for navigators operating in high-risk areas or near commercial ports, where interference is more frequent. The system then issues an alert via the NMEA 2000 bus, visible on compatible multifunction displays.
WiFi connection and tablet browsing: towards a universal gateway
OneFix integrates a secure WiFi interface, accessible via any mobile device. Not only does it enable sensor configuration and constellation status to be viewed, it also broadcasts NMEA 2000 data (speed, wind, depth, AIS, heading) in real time to navigation applications such as Navionics, TZ iBoat or OpenCPN. This feature turns a tablet into a stand-alone navigation station, while simplifying integration into an existing installation. Data can also be exported in GPX/KML format for subsequent analysis on Google Maps.
Man overboard: an integrated AIS MOB alert
OneFix offers a dedicated input for a MOB (man overboard) switch, which generates an AIS MOB SART message on the NMEA 2000 network. This alert is immediately visible on onboard multifunction displays, and can be relayed via a buzzer or audible alarm. This device offers a simple, low-cost solution to complete on-board safety, particularly on smaller vessels not equipped with more complex MOB systems.
