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Air traffic control system

  • US 3,925,750 A
  • Filed: 11/19/1971
  • Issued: 12/09/1975
  • Est. Priority Date: 11/15/1968
  • Status: Expired due to Term
First Claim
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1. An aircraft navigation instrument comprising:

  • an aircraft indicia presented at the center of the instrument and controlled so as to indicate the aircraft'"'"''"'"'s heading, a vertical indicator on the instrument for indicating the aircraft'"'"''"'"'s offset from a selected ground location, a horizontal indicator on the instrument for indicating the aircraft'"'"''"'"'s distance to or from said selected ground location, indicia on the instrument for indicating the position of other aircraft, and including a larger indicia which represents a selected one of said other aircraft.

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