The flight was conducted under special visual flight rules , which require the pilot to remain clear of cloud and in visual contact with the surface 该次飞行是按照特殊目视飞行规则进行;根据该规则,飞行员须一直离开云层并能目视地面。
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,并与其他航空器、地面障碍物体保持安全距离。
Pilots fly under “ visual flight rules ” ? they file a flight plan with a local flight service station , navigate by altimeter and visual cues , and stay out of controlled airspace 驾驶员按照目视飞航规则飞行,也就是先向区域性的飞航服务站提出飞行计画书,然后利用高度计和目视地标航行,并且不能进入飞航管制的空域。