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pl23_theb2153.jpg

Operator using Dorsey Fathometer with flashing light method

Image

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Permalink

https://www.noaa.gov/media/digital-library-photo/pl23theb2153jpg

Description

Operator using Dorsey Fathometer with flashing light method.Merchant Marine Bulletin No. 9, May 1931

Credit

NOAA Central Library

Keywords

Charting

Soundings