First whole operational season using Shoran electronic navigation system. Work accomplished by USC&GS Ships EXPLORER and SURVEYOR. Dotted lines are ship tracks controlled by Shoran.

Image ID: cgs00660, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Alaska, Attu Island, Aleutians
Photo Date: 1946
Credit: NOAA Central Library Historical Imagery

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