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luminous range
noun
, Navigation.
- the distance at which a certain light, as that of a lighthouse, is visible in clear weather, disregarding interference from obstructions and from the curvature of the earth and depending on the power of the light.
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Example Sentences
I hurriedly gaze through the luminous range bars, fixed at right angles to the direction bar.
From Project Gutenberg
The machine ceases its leftward drift and swings to the right, and the two luminous range-bars are in line with the bridge.
From Project Gutenberg
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