Blog Editor’s Note: The South Korean eLoran project has been delayed several times over the last five years, we understand due to changes in administrations and government focus on other issues. It is good to see some progress in this resilient PNT effort. – Full disclosure, UrsaNav is a corporate member of the RNT Foundation.


UrsaNav Awarded Contract to Supply eLoran Transmitter Test Bed System in the Republic of Korea

By Inside GNSS Staff

The Korea Research Institute of Ships and Oceans Engineering (KRISO) has awarded UrsaNav, through its agent, Dong Kang M-Tech, a contract to supply an eLoran Transmitter TestBed System in the Republic of Korea. UrsaNav, the exclusive, worldwide distributor of Nautel’s NL Series transmitters, will provide eLoran transmitter technology, as well as timing and control equipment.

This contract represents the first phase in a broader program to upgrade Korea’s Loran-C stations to be the foundation of a sovereign Enhanced Loran (eLoran) Positioning, Navigation, and Timing (PNT) service.The Republic of Korea recognizes the challenges associated with relying solely on space-based signals, the relative ease with which those signals can be jammed or spoofed, and the necessity to provide Trusted Time and Trusted Position to its citizens and critical national infrastructure, according to a press release.

Accurate time and position are necessary components upon which many critical infrastructure sectors rely, including maritime, aviation, electrical distribution, telecommunications, finance/banking, and digital broadcast. A complementary PNT (CPNT) service provides continuity of operations through alternative and diverse timing and positioning information. CPNT is a vital element in ensuring national security and assuring Trusted Time and Trusted Position.

eLoran is the latest in the longstanding series of low-frequency (LF), LOng-RAnge Navigation (LORAN) systems. It is designed to meet the accuracy, availability, integrity, and continuity performance requirements for maritime harbor entrance and approach maneuvers, aviation En Route and Non-Precision Approaches, land-mobile vehicle navigation, and location-based services. It provides bearing (azimuth) information, even when the user is not moving, and has built-in integrity.

Users within the coverage area can simultaneously synchronize their timing to absolute (not relative) UTC. Of equal importance is that the eLoran signal includes one or more Loran Data Channels that are available to provide one-way, low data rate, “Short Message Service” information.

eLoran is independent of GPS/GNSS, operates in the internationally protected 90 to 110 kHz spectrum, is built on internationally standardized Loran-C, and provides a high-power PNT service for use by all timing and navigation users. SAE International expects to release eLoran standards this year. The RTCM also has maritime-related eLoran standards underway.