在晴天，在管制空域内的飞行员可以选择目视飞行规则或者仪表飞行规则的飞行计划，而且联邦航空局的条例是以这样一种方式设计的：在同一空域同时适用目视飞行规则和仪表飞行规则的操作。
On a clear day, a pilot in controlled airspace can choose a VFR or IFR flight plan, and the FAA regulations were devised in a way which accommodates both VFR and IFR operations in the same airspace.
飞行员必须依靠常被称为“看到并避开”的目视飞行规则。
Pilots must rely on visual flight rules that are often referred to as' see and avoid. '.
对于以目视飞行规则飞行的飞机，是飞机将到达机场上空的估计时间。
For VFR flights, the time at which it is estimated that the aircraft will arrive over the aerodrome.
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。
A civil aircraft performing visual flight shall observe visual flight rules and keep a safe separation from other aircraft and ground obstacles.
受管制空域，一个范围明确的空域。在该空域内，仪表飞行规则飞行和目视飞行规则飞行有空中交通管制服务。
CONTROLLED airspace, an airspace of defined dimensions within which air traffic control service is provided to IFR flights and to VFR flights in accordance with the airspace classification.
离场控制，给用仪表飞行规则离场，和在某种情况下用目视飞行规则离场的飞机提供空中交通管制服务的进近管制设施的一种功能。
DEPARTURE control, a function of an approach control facility providing air traffic control service for departing IFR and, under certain conditions, VFR aircraft.
离场控制，给用仪表飞行规则离场，和在某种情况下用目视飞行规则离场的飞机提供空中交通管制服务的进近管制设施的一种功能。
DEPARTURE control, a function of an approach control facility providing air traffic control service for departing IFR and, under certain conditions, VFR aircraft.
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