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Pilot's traffic monitoring system

  • US 4,197,538 A
  • Filed: 06/02/1978
  • Issued: 04/08/1980
  • Est. Priority Date: 08/02/1976
  • Status: Expired due to Term
First Claim
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1. A system apparatus for monitoring the movement of at least one "other ship" comprising in combination,means for receiving a signal on the position and altitude of the "other ship" within a transmit-receive duty cycle,means operatively connected to said receiving means for demodulating its signal,first means for converting into a Cartesian or like coordinate reference frame a signal representing "own ship" position,second means for discriminating against a signal representing the altitude of an "other ship" not within a preselected band of "own ship" altitude,third means for synchronizing an altitude signal and converted position signal of "own ship" and a signal of the "other ship" not discriminated against and within such preselected band of altitude,means for graphically displaying "own ship" and "other ship" relative positions operatively connected to said synchronizing means,whereby a representation of "other ship" lying within the preselected band of altitude about "own ship" is visually observed on said display means.

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