A civil aircraft performing visual flight shall observe visual flight rules and keep a safe separation from other aircraft and ground obstacles. 进行目视飞行的民用航空器,应当遵守目视飞行规则(VFR),并与其他航空器、地面障碍物体保持安全距离。
It indicates that fighter pilots acquire information mostly from the OV in VFR ( visual flight rules ) condition and most of their visual attention is allocated to the outside world. 表明视觉飞行规则下,战斗机驾驶员主要从外景获取视觉信息,他们的大部分注意力都集中在外景。