Considered is the problem of small-vessel surveillance within a 30 mm radius. Such information would allow quick vessel assistance and position advisory under all weather conditions. A minimum data rate of 10 vessels per minute is desired, with positive vessel identification and Loran-C accuracy. The system discussed employs low cost user equipment based on existing VHF-FM transceiver and crystal reference. Adequate performance is achieved through the use of Loran spectra compression prior to retransmission, coupled with a high-speed parallel estimator algorithm for cycle ambiguity reduction. A data link provides for AGC control as well as entry and addressing. A performance analysis is carried out for the major system components. Lastly, overall performance is computer for high and low-altitude search vehicles at various locations within East Coast Loran-C coverage.

  • Supplemental Notes:
    • Presented at the National Marine Navigation Meeting, Maritime Institute of Technology and Graduate Studies, Linthicum Heights, Maryland, October 31-November 1, 1977.
  • Corporate Authors:

    Institute of Navigation

    815 14th Street, NW
    Washington, DC  United States  20005
  • Authors:
    • Sennott, J W
  • Publication Date: 1977

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00170500
  • Record Type: Publication
  • Source Agency: Institute of Navigation
  • Files: TRIS
  • Created Date: Mar 14 1978 12:00AM