Navigation light

Basic lighting configuration. 2=a vessel facing directly towards observer; 4=vessel facing away from the observer.

A navigation light, also known as a running light, is a colored source of illumination on a waterborne vessel, aircraft and some spacecraft, used to signal a craft's position, heading, and status. Commonly, their placement is mandated by international conventions or civil authorities. Contrary to the name, these lights are not used for navigating. They indicate the craft's relative position, and are thus, often called "Position lights".

单词	Ship light
释义	Ship light 原声例句当月 CNN 10 学生英语 The video showing the ship's lights flickering twice before veering off course and crashing. 视频显示，在偏离航线并撞毁之前，这艘船的灯光闪烁了两次。英语百科 Navigation light A navigation light, also known as a running light, is a colored source of illumination on a waterborne vessel, aircraft and some spacecraft, used to signal a craft's position, heading, and status. Commonly, their placement is mandated by international conventions or civil authorities. Contrary to the name, these lights are not used for navigating. They indicate the craft's relative position, and are thus, often called "Position lights".
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Ship light

Navigation light