GNSS jamming and spoofing are a growing challenge in several maritime regions. When satellite signals are disrupted or manipulated, the consequences can include incorrect positioning, reduced situational awareness and increased navigational risk. Furuno offers solutions that detect and provide alerts to such events, while providing a more robust source of position and time data when GNSS signals from conventional equipment can no longer be relied upon.

Safe navigation during GNSS jamming and spoofing

When your position can no longer be trusted

Jamming and spoofing attacks interfere with satellite-based positioning. A vessel may lose its position entirely, or the signals may be manipulated so that the vessel suddenly appears in the wrong location on the chart while the navigation equipment continues to present the position as valid. In a spoofing event, vessels within the affected area may simultaneously have their positions shifted to the same false location or suddenly begin to follow a common, manipulated movement pattern.

Jamming: Intentional radio frequency interference that blocks or degrades GNSS signals, resulting in reduced positioning accuracy or loss of position.
Spoofing: Transmission of false GNSS signals designed to mislead the receiver, resulting in incorrect position, navigation or timing data.

For the navigator, it is essential to know whether the position being presented can be trusted. This requires continuous monitoring of GNSS signals, automated integrity assessment and immediate alerts when anomalies are detected.

Early warning of GNSS interference

Furuno FFSP-100 continuously monitors GNSS signals and alerts the navigator when it detects anomalies that may indicate jamming or spoofing. The system monitors signals from GPS, Galileo, GLONASS and BeiDou, analysing signal strength and several other characteristics of the received signals.

Reliable GNSS information is essential to a range of bridge systems. Radar, ECDIS, satellite compass, AIS and other navigation systems use GNSS as a reference for position, date and time. Compromised or reduced integrity of GNSS data can therefore affect several systems simultaneously.

When abnormal signal conditions are detected, FFSP-100 provides alerts through a dedicated FFSP Display and Alarm Unit, using visual indicators and audible alarms. Alerts can also be transmitted to the vessel's BAMS (Bridge Alert Management System) via contact closure and to the VDR, ensuring that the event is recorded.

Early warning alerts the navigator to reduced GNSS data integrity before the vessel's primary GNSS equipment loses its position fix. This provides valuable time to assess the situation and take appropriate action.

Robust positioning in challenging conditions

Furuno FFGR-10 with the Tallysman anti-jamming antenna is designed to provide more robust GNSS positioning in challenging signal conditions. The two components perform different functions: the Tallysman antenna reduces the impact of interference before the GNSS signals reach the receiver, while FFGR-10 processes the signals and calculates the vessel's position.

The Tallysman antenna is designed to attenuate signals arriving at low elevation angles. This reduces the impact of interfering signals from sources on land or other vessels, while preserving GNSS signals from satellites higher in the sky. Signals arriving at low elevation angles are typically attenuated by 20 dB. Integrated RF filters also reduce the impact of strong signals outside the GNSS frequency bands.

FFGR-10 can receive signals across multiple frequency bands and from multiple satellite constellations simultaneously. In challenging signal conditions or during deliberate attacks, the combination of multi-band, multi-constellation reception and interference protection provides significantly more robust positioning than conventional GNSS equipment.

FFGR-10 meets the requirements of IEC 60945 for maritime navigation and radiocommunication equipment. On SOLAS vessels, FFGR-10 can be used as a supplementary GNSS positioning source alongside the vessel's wheelmarked GNSS equipment, subject to acceptance by the relevant flag state.

LAB-demonstration of jamming og spoofing

Consider action before GNSS interference becomes an operational issue

Through our global service network, we are familiar with the challenges that jamming and spoofing create for vessels operating in affected areas. So far, these challenges have been particularly evident in the Baltic Sea and in the northernmost and easternmost areas along the Norwegian coast. We are also aware of vessels experiencing GNSS interference in the Barents Sea.

For some vessels, GNSS interference is already an operational issue that needs to be addressed. For others, the risk picture is changing and can be difficult to predict. Our solution detects and provides alerts to GNSS interference while delivering more robust GNSS positioning in challenging signal conditions. It is easy to install and commission and can be integrated with the vessel's existing navigation systems. Through our national and global service network, the solution is readily available wherever your vessel operates.

Feel free to contact us for more information or a quotation for the solution.