range light

noun

1. one of a pattern of navigation lights, usually fixed ashore, used by vessels for manoeuvring in narrow channels at night
2. one of a distinctive pattern of lights shown at night on the masts of a powered vessel, such as a tugboat, to aid in identifying its size, number of barges in tow, etc

Example Sentences

Reaching the top, and stealing to one side out of the dim range light, I took hasty survey of the deck.

From Project Gutenberg

The range-light emits light toward all points of the compass and must be intense enough to be seen at a distance of three miles.

From Project Gutenberg

Rick passed the range light and headed for the red tower that marked the opening of the Narrows.

From Project Gutenberg