The PROSAS Surveyor provided the most detailed sonar image of the steamship Portland yet made. Please visit http://stellwagen.noaa.gov/maritime/portland.html for more information on this vessel. Image courtesy of NOAA/SBNMS and Applied Signal Technology, Inc.
Download high-resolution image (jpg, 2.3 Mb)
Related Links
Stellwagen Bank National Marine Sanctuary 2010
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