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DISCRETE CODE

Pilot/Controller Glossary with JO 7110.65BB, Change 3, effective July 9, 2026 · Official text on faa.gov

As used in the Air Traffic Control Radar Beacon System (ATCRBS), any one of the 4096 selectable Mode 3/A aircraft transponder codes except those ending in zero zero; e.g., discrete codes: 0010, 1201, 2317, 7777; nondiscrete codes: 0100, 1200, 7700. Nondiscrete codes are normally reserved for radar facilities that are not equipped with discrete decoding capability and for other purposes such as emergencies (7700), VFR aircraft (1200), etc.

See RADAR.

Refer to AIM.

In the 7110.65

Used in 10 paragraphs of JO 7110.65BB.

  1. 5-2-1Assignment Criteria
  2. 5-2-3Emergency Code Assignment
  3. 5-2-8Beacon Codes for Pressure Suit Flights and Flights Above Fl 600
  4. 5-2-9Air Defense Exercise Beacon Code Assignment
  5. 5-3-3Beacon/Ads-B Identification Methods
  6. 5-4-3Methods
  7. 5-4-6Receiving Controller Handoff
  8. 5-14-1Application
  9. 9-1-3Flight Check Aircraft
  10. 9-2-6IFR Military Training Routes