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距离环 是什么?

距离环 Circular overlays on a navigation display or chart, spaced at regular intervals from a reference point or airport, used for situational awareness and range estimation.

Source: ICAO Doc 9432, FAA PCG

How is “距离环” Used in Practice?

在导航显示器上显示距离环以辅助距离检查和交通间隔。

Certification Exam Relevance

ICAO Level 4ICAO Level 5ICAO Level 6EASA FCL.055

Who Needs to Know This Term?

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

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Frequently Asked Questions

距离环 是什么?

Circular overlays on a navigation display or chart, spaced at regular intervals from a reference point or airport, used for situational awareness and range estimation.

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