We have designed and developed an anti-collision system composed of a conventional marine radar, a processor, a CRT display and a computer. This system provides three modes of tracking; automatic tracking, manual initiation and manual plotting. The most essential of the features this system ensures is that the true aspects of tracked targets can be obtained by superposing the true speed vectors on the relative motion presentation. The experiments on the sea were made for 38 days from October 29, 1973 to December 3, 1973 on coastal waters in Japan on board the Gingamaru, a ship owned by the Institute for Sea Training, Ministry of Transportation. A comparison of the data from the computer with the data in manual plotting was made for various targets on the CRT display. The result of the tests showed that the difference in speed and course between the automatic data and the manual ones was very small. The direction and length of the vector for a target were almost equal to the data obtained by manual plotting.

  • Supplemental Notes:
    • Presented at the RTCM Assembly Meeting, St. Petersburg, Fla., April 1-3 1974, with the Propeller Club of the United States. Vol. 1, Papers A-F, Maritime Electronics. Vol. 2, Papers G-N, Maritime Satellite Systems and Maritime Navigation. Vol. 3, Papers O-T, Maritime Telecommunication Trends. Vol. 4, Papers 0A-0I, Maritime Transponders and Collision Avoidance Systems. Sold as a complete 4 volume set for $15.00.
  • Corporate Authors:

    Radio Technical Commission for Marine Services

    /Federal Communications Commission
    Washington, DC  United States  20554
  • Authors:
    • Ohwaki, T
    • Shimizu, A
    • Oku, S
  • Publication Date: 1974-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00057098
  • Record Type: Publication
  • Source Agency: Radio Technical Commission for Marine Services
  • Report/Paper Numbers: Symposium Papers 0H
  • Files: TRIS
  • Created Date: Aug 16 1974 12:00AM