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Radar anti-collision system for ships in waters adjacent land areas

  • US 3,890,616 A
  • Filed: 09/06/1973
  • Issued: 06/17/1975
  • Est. Priority Date: 12/28/1972
  • Status: Expired due to Term
First Claim
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1. A radar anti-collision system, for avoiding collisions between water-borne vessels in waters adjacent land areas, comprising, in combination, a radar mounted on a vessel and scanning objects in the course of the vessel;

  • a data processing unit having an input connected to said radar and processing the positional data of land areas and of other vessels scanned by said radar;

    a computer connected to the output of said data processing unit;

    an auxiliary memory connected to an input of said computer and having stored therein a set of marine positional data with respect to land areas adjacent the course of the vessel, said auxiliary memory supplying the stored data to said computer in accordance with a present program for comparison, in said computer, with the positional data supplied by said data processing unit from said radar; and

    a general display unit connected to the output of said computer;

    said computer comparing the stored positional data with the processed positional data and, responsive to such comparison indicating that the vessel is at a greater distance from land areas than limits defined by the stored positional data, cancelling processed positional data relating to land areas from the positional data to a collision avoidance progRam in said computer so that the processing by said collision avoidance program becomes more reliable and the data displayed on said general display unit, responsive to such comparison indicating that the vessel is at a greater distance from land areas than limits defined by the stored positional data, does not include any positional data relating to land areas.

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