下降顶点 是什么？
下降顶点 The calculated point during cruise at which an aircraft initiates descent from cruising altitude toward destination, usually determined by onboard flight management systems.
Source: ICAO Doc 9432, FAA PCG
How is “下降顶点” Used in Practice?
飞行员：我们已到达下降顶点，开始下降到180高度层，已获批准。
Certification Exam Relevance
Who Needs to Know This Term?
- Pilots
- Air Traffic Controllers
- Cabin Crew
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下降顶点 是什么？
The calculated point during cruise at which an aircraft initiates descent from cruising altitude toward destination, usually determined by onboard flight management systems.
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