在被飞行员用于描述偏置航路时，除了在雷达控制的情况下，确定直线航段的导航点成为必报点。
When used by pilots in describing off-airway routes, points defining direct route segments become compulsory reporting points unless the aircraft is under radar control.
首先，根据飞行航路规划中导航点属性复杂的特点，扩充导航点的模型，并在此基础上采用导航点链表形式的自由编码。
Firstly, in respect of the complex attribute of navigating point in air route planning, it expands the model of navigating point and adopts free coding with the list of navigating point.
首先，根据飞行航路规划中导航点属性复杂的特点，扩充导航点的模型，并在此基础上采用导航点链表形式的自由编码。
Firstly, in respect of the complex attribute of navigating point in air route planning, it expands the model of navigating point and adopts free coding with the list of navigating point.
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