Four dashes, repeated for one minute every three minutes, is the radio beacon signal of the lightship that guards dread Nantucket Shoals. The first lightship was stationed off the shoals in 1854. Three years ago Lightship No. 117, a 132-ft. craft equipped with every device science could think of to protect transatlantic shipping, was launched at Charleston, S. C. and took up its rough and lonely post 40 mi. southeast of Nantucket Island.
One morning last week fog curled in thick shrouds around the little vessel. Useless was the 16,000 candlepower electric light...
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