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News > Thomas Jefferson to Map Ocean Floor in Gulf of Mexico

Thomas Jefferson to Map Ocean Floor in Gulf of Mexico

  07/04/2010
Updating and maintaining nautical charts of the US East Coast, Gulf of Mexico, Puerto Rico and the US Virgin Islands is currently underway by NOAA Ship Thomas Jefferson. The vessel, one of the most technologically advanced hydrographic survey ships in the world, left Norfolk (VA, USA), on 6th April for the five-month voyage to map the seafloor and look for hazards to navigation off the Gulf coast. Nautical charts and other navigational products are available at the NOAA Office of Coast Survey website.

Thomas Jefferson in open waters

"The Gulf of Mexico has been affected by a number of large hurricanes in recent years, and our work will pinpoint the resulting hazards and shoals in these busy waters," said Cmdr. Shepard Smith, Thomas Jefferson's commanding officer.


"With dynamic changes in maritime commerce, especially the tremendous growth in the size and draft of commercial vessels, surveying coastal areas and sea lanes helps to support America's maritime economy," said Capt. John Lowell, director of NOAA's Office of Coast Survey. "Waterborne cargo contributes more than USD742 billion to the nation's economy, and NOAA's hydrographic surveys provide real support for continuing growth in maritime trade."


Equipped with high-resolution seafloor imagers, the 208ft Thomas Jefferson and 36-person crew can map the ocean bottom and identify areas of interest to coastal managers, biologists, geologists and emergency responders.


In 2005, Thomas Jefferson conducted hydrographic surveys to support safe navigation and commerce following Hurricane Katrina and Hurricane Rita.


NOAA Ship Thomas Jefferson was named in honour of the president who, in 1807, formed the Survey of the Coast, the agency whose successors would eventually become part of NOAA. Thomas Jefferson is part of the NOAA fleet of ships and aircraft operated, managed and maintained by NOAA's Office of Marine and Aviation Operations, which includes commissioned officers of the NOAA Corps and civilian wage mariners.
NOAA understands and predicts changes in the Earth's environment, from the depths of the ocean to the surface of the sun, and conserves and manages our coastal and marine resources.

 





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 NOAA  Surveying  Environment 

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Hydrographic Survey of Riverbed Erosion

Members of the US Geological Survey were filmed while out on the Missouri River at Williston, North Dakota, USA, performing a hydrographic survey to monitor the state of riverbed erosion. They were using a multibeam echo sounder which transmits sound energy and analyses the return signal (echo) that has bounced off the riverbed or other objects. Multibeam sonars emit sound waves from directly beneath a ship's hull to produce fan-shaped coverage of the riverbed. 


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