视觉辅助设备的正确设计和安装是机场运营安全的先决条件。第4部分介绍了机场使用的视觉辅助设备的特点。其中一些主题包括:可视地面辅助设备的功能要求；表面标记和标记；进场照明系统；精密进近跑道和滑行道的灯光特性；跑道引入照明系统；跑道和滑行道照明；地面运动制导与控制系统；滑行引导标志和障碍物照明。

Proper design and installation o visual aids are prerequisites for the safety of airport operations. Part 4 provides information on the characteristics of visual aids used at airports. Some of the topics covered are:functional requirements of visual ground aids;surface marking and markers;approach lighting systems;light characteristics for precision approach runways and taxiways;runway lead-in lighting systems;runway and taxiway lighting;surface movement guidance and control systems;taxiing guidance signs and obstacle lighting.