Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 132
ea. The internal communica-tion lighting signals consist of numerouscircuits for conveying a definite messageby illuminating a glass or other trans-lucent dial on which the message is shown.Distance signalling is accomplishedprincipally by the Ardois light, semaphorelight, blinker light and the… … Fig. 3.—Showing ship navigation lights indicator. further. The possible applications ofsearchlights in the mercantile marine,in addition to their familiar uses on warvessels, deserve attention. It has beensuggested that they would sometimes beof value in locating icebergs or approachingvessels,…
Lighting
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