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	Boat light
释义	Boat light 原声例句当月 CNN 10 学生英语 2020年5月合集 Our hull when it comes off weighs less than 200 pounds which is a really, really light boat. 我们的船体脱落时重量不到200磅，这是一艘非常非常轻的船。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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Boat light

Navigation light