The increase in maritime traffic in such areas as the Channel and the Dover Strait gives rise to a number of problems, which are increased by the wide range in the sizes and speeds of the vessels, and the overloading of the channels of communication, which in turn leads to often serious delay in the transmission of messages. The application of secondary radar to the comparable problems of air traffic could with advantage be adopted at sea. The system proposed in this paper would require the installation of transponders in all vessels. They would be interrogated either from the shore, if a centralized control system were to be adopted, or from patrol vessels which would relay information to other ships and which might also be linked with primary radar. Interrogation through rotating aerials would determine the polar coordinates of a transponder. This would allow an exchange of messages relating to the identity, tonnage, speed and course of a vessel or any other concise information to aid navigation.

  • Supplemental Notes:
    • From Man and Navigation, Summaries of the papers presented at the International Congress of the Institutes of Navigation held at the University of Sussex, Falmer, England, 10-14 Sept 1979.
  • Corporate Authors:

    Royal Institute of Navigation, England

    1 Kensington Gore
    London SW7,   England 
  • Authors:
    • Janex, A
  • Publication Date: 1979

Media Info

  • Pagination: n.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00197075
  • Record Type: Publication
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS
  • Created Date: Sep 29 1979 12:00AM