Salisbury Sound (AV 13) - Naval Cruise Book

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l I es Daman A11 im-P01't3H'C Part of SALLY's local color is P1'0Vided by the ShiP's signal gang. Gay musti-colored bits of bunting stiffening in the breeze, the whirling dervish-like signalman sending semaphore, the in- sistant staccato flashes of light to and from the shipg all are handled by CS Division. Although visual communication is almost as old as seamanship itself, it is still an indispensible part of today's intricate navy. No other form of naval communication is so secure. The signal gang transmits messages on a directional, line-of-sight, beam of light. At night even this narrow beam becomes in- visible as signalmen shift to infra-red light. There is no need to break radio silence when other ships are in sight, and there is no background noise with visual , Regardless of technical progress, the basic rudi- ments of visual communication remain the same as in the days of Napoleon's mechanical semaphore, or even Greek signal fires. Flags and a bright blinker light fill the material requirements, to which must be added an alert, knowledgable signal gang. td 5 tio s ' :- s ,A 3 x Q 1 A n 5 1 4 f PO! J . A N 't ' ll -1' N, -- H 'Cm

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