Atlas Elektronik FreeFlight Systems Eurofix - Delft University of Technology FAA LOREG Program Megapulse, Inc. Rockwell Collins Symmetricom Timing Solutions, Inc.
Global Loran Coverage Northwest European Loran-C System (NELS) Radionavigation Group at the University of Wales, Bangor, UK USCG Navigation Center
Institute of Navigation (ION) International Civil Aviation Organization (ICAO) International Loran Association (ILA) Radio Technical Commission for Maritime Services (RTCM) The Commissioners of Irish Lights (CIL) International Telecommunications Union (ITU) Radio Technical Commission for Aeronautics (RTCA) Royal Institute of Navigation International Electrotechnical Commission (IEC) Trinity House Lighthouse Authority
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United States Naval Observatory Precise Time and Time Interval (PTTI) NIST Time and Frequency Division National Physical Laboratory (NPL), Time and Frequency
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