The ROV Little Hercules' scanning sonar imaged this 19th century wooden-hulled shipwreck in March 2012.

The ROV Little Hercules' scanning sonar imaged this 19th century wooden-hulled shipwreck in March 2012. Image courtesy of the NOAA Okeanos Explorer Program.

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Related Links

Observation Tools: SONAR

NOAA Ocean Explorer: Technology