NJORD R-Mode Transmitter NJORD R-Mode Transmitter

NJORD

R-Mode Transmitter | Reliable Positioning
in GNSS-Denied Environments

The Novator Solutions NJORD R-Mode Transmitter provides resilient, shore-based positioning corrections for maritime users operating in GNSS-denied or degraded environments. Integrating seamlessly with existing or newly established beacon infrastructure, it delivers robust navigation support using terrestrial medium frequency transmissions, ensuring safe and continuous positioning in critical maritime regions worldwide. 

Key Facts 

  • Fully integrated R-Mode transmitter rack
  • Compatible with existing and new MF (medium frequency) beacon infrastructure 
  • Includes high-stability clock, MSK (minimum shift keying) modulation module, and GNSS/GPS antennas
  • Remote network configuration and monitoring 
  • Designed for continuous 24/7 maritime operation 
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NJORD is a fully integrated, shore-based R-Mode transmitter designed to provide resilient maritime positioning in environments where GNSS is unavailable, degraded, or unreliable. Built on terrestrial medium-frequency transmissions, it enables safe navigation by delivering continuous ranging signals independent of satellite systems. 

Developed for next-generation resilient navigation systems, NJORD is based on Ranging Mode (R-Mode) technology advanced through initiatives such as the Interreg Baltic Sea Region ORMOBASS project. It can be deployed at existing MF or DGPS beacon sites or installed as part of new dedicated R-Mode infrastructure, offering a cost-effective path to enhanced maritime safety. 

The transmitter integrates a high-stability reference clock, MSK and CW modulators, and GNSS/GPS antennas within a compact 19-inch rack-mounted unit. Secure remote network operation allows centralised monitoring, configuration, and performance management across multiple installations. 

  • Resilient positioning independent of GNSS
    Provides a terrestrial alternative to satellite navigation, ensuring continuity during GNSS outages, interference, or intentional disruption. 
  • Leverages existing infrastructure
    Compatible with existing MF and DGPS beacon installations, minimising deployment time and integration costs. 
  • High positioning accuracy
    Delivers positioning accuracy typically between 10 and 100 metres, with daytime performance commonly in the 10–20 metre range, depending on network geometry and station availability. 
  • Designed for continuous operation
    Engineered for 24/7 maritime use in harsh coastal environments, meeting stringent requirements for reliability and signal integrity. 
  • Remote monitoring and control
    Enables secure, centralised network management across multiple shore stations via Ethernet-based interfaces. 
  • Maritime navigation in GNSS-denied or degraded environments
    Supports safe vessel positioning in coastal waters, ports and critical maritime corridors. 
  • National and regional resilient PNT systems
    Forms a key component of terrestrial positioning, navigation and timing (PNT) strategies. 
  • Backup and redundancy for satellite navigation
    Complements GNSS by providing an independent positioning layer for safety-critical operations. 
  • Coastal and port authority infrastructure
    Enhances maritime safety services through shore-based positioning support. 
Parameter Specification
Transmission Type MF R-Mode (MSK-modulated)
Frequency Range 283.5 – 325 kHz
Frequency Resolution (MSK) 500 Hz
Frequency Resolution (CW) 1 Hz
Frequency Accuracy < 1 µHz
Antenna Interface 50 Ω terminated, 1 V peak-to-peak
Output Power Configurable up to site limits
Reference Clock 10 MHz and PPS (pulse-per-second)
Control Interface Ethernet (remote network operation)
RTCM Interface TCP / IP / RS 232
Rack Format 19” rack
Power Supply 230 V AC, 50 Hz