Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 67
seen at a range of over 30miles from an altitude of six thousandfeet. This light was placed in a lonelytract of country, no other lights being ranges; it will be seen that underfavourable conditions a pilot wTill alwaysbe within the range of two of these lightswhile flying along this route. Marine… … S SO Diagram D.—Range Curve for Later Aerial Lighthouse. exhibited within a radius of many miles.Experiments with similar lights underpeace-time conditions of town illumina-tion have, shown that such lights areuseless to aviators, again demonstrating l-s Diagram E.—Illustrating relation…
Lighting
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