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Brass patent


The green object, is probably a brass patent log that would be towed from the ship to determine speed. Image courtesy of NOAA/NURC-UConn/The Science Channel.

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Steamship Portland Exploration

Steamship Portland Logs: Sept. 18, 2003

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http://oceanexplorer.noaa.gov/explorations/03portland/logs/sept18/media/patentlog.html