First C&GS electronic base line measurements. Base crossings by ship over Shoran network. Minimum value from two range-range stations gives distance. C&GS Ship EXPLORER

Image ID: theb1681, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Bering Sea, Alaska
Photo Date: 1951
Credit: C&GS Season's Report 1951-92

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