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Signal for help. Woman showing sequence of gesture on black background, collage
The National Historic Site of Signal Hill, featuring the Cabot Tower, is visible from Fort Amherst, which is another National Historic Site located across the Narrows.
Traffic light with green signals indicating directions to go straight and turn right
The digital stock market chart displayed a sign of a potential crash on the business information board
Nautical flags fluttering in the wind. Colorful signal flags

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