B744属于RECAT-CN中的哪一类机型

When would a CIRCLING APPROACH be used?

What is the purpose of a CHANGE-OVER POINT?

What is the difference between ALTITUDE and HEIGHT?

At DECISION ALTITUDE/HEIGHT, if the required visual reference for continued approach is not obtained, what should be done?

What is DECISION ALTITUDE/HEIGHT?

What is a CIRCLING APPROACH?

What does ALTITUDE refer to?

在RVSM空域内，管制员针对通信失效或发生其他特殊情况的航空器与其他任何航空器，应该配备最小为（）米的垂直间隔。

在RVSM空域内，管制员针对未获准RVSM运行的航空器与其他任何航空器，应该配备最小为（）米的垂直间隔。

管制员使用条件性指令时，对先决条件的描述要（）