L-shaped traffic pattern indicators are part of the segmented circle, a visual indicator system designed to provide traffic pattern information.[1]

In aviation, a traffic pattern indicator is an L-shaped device which show the airfield traffic pattern to the in-flight aircraft over an aerodrome.[2] The short arm of the "L" represents the base leg, and the long arm the final approach.[3] If no segmented circle is installed, traffic pattern indicators may be installed on or near runway ends.[4]

References

  1. "Chapter 14: Airport Operations". Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C ed.). Federal Aviation Administration. 2023-07-17. p. 20.
  2. United States. Flight Standards Service. Airman Testing Standards Branch. (2007). Airplane Flying Handbook. New York: Skyhorse Publishing. ISBN 978-1-60239-003-4.
  3. Winters, Karl (2018). "How to Interpret Segmented Circles". Gleim Aviation. Gleim Publications Inc. Retrieved 2022-03-19.
  4. "Section 3. Airport Operations". Federal Aviation Administration. p. 4-3-4.b.5. Retrieved 11 January 2024.


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