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pl23_theb4090.jpg

Field's protractor and parallel ruler in use on a chart, plotting bearing of alighthouse

Image

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Permalink

https://www.noaa.gov/media/digital-library-photo/pl23theb4090jpg-0

Description

Field's protractor and parallel ruler in use on a chart, plotting bearing of alighthouse. In: Putnam, G.R. 1908. Nautical Charts. J. Wiley and Sons,

Collection

Historic Coast & Geodetic Survey