Bilby tower
A Bilby tower is a type of survey tower made from steel and used by the United States Coast and Geodetic Survey (USC&GS) from 1927 to 1984. It is named after Jasper S. Bilby who designed it in 1926.
A Bilby tower is a type of survey tower made from steel and used by the United States Coast and Geodetic Survey (USC&GS) from 1927 to 1984. It is named after Jasper S. Bilby who designed it in 1926.
A Bilby tower is a type of survey tower made from steel and used by the United States Coast and Geodetic Survey (USC&GS) from 1927 to 1984. It is named after Jasper S. Bilby who designed it in 1926.
Source: Wikipedia "Bilby tower" · CC BY-SA 4.0
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