Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 65
; on thelight being extinguished by a sun valvethe optic ceases to rotate. This sunvalve together with the automaticmantle replacement gear also employedhas already been described in my remarkson the automatic wind-indicator foremergency landing grounds. The experience gained baa so Ear beenonly in… … Fit.. 2. First Aerial Lighthouse at rlounslow. Local Pilotage Lights. In addition to the Long range navigatinglights placed at selected points on theroute giving the greatest all-roundvisibility it was necessary to consider thebest form of local pilotage light. Itwas found that an ordinary flashing…
Lighting
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