Searching The Graveyard of the Atlantic for WW2 lost ships

By Mark Dunphy - Irish Weather Online

The National Oceanic and Atmospheric Administration (Graveyard of the Atlantic), which recently participated in a dive to the Titanic, will lead a summer research expedition to locate and study World War II shipwrecks sunk in 1942 off North Carolina during the Battle of the Atlantic, specifically the Battle of Convoy KS-520.

The shipwrecks are located in an area known as the “Graveyard of the Atlantic”, which includes sunken vessels from U.S. and British naval fleets, merchant ships and German U-boats.

“This summer will be the most ambitious of our Battle of the Atlantic research expeditions, and potentially the most exciting,” said David W. Alberg, superintendent, USS Monitor National Marine Sanctuary.

“This expedition is all about partnerships, collaboration and using cutting edge technology to search for and document historically significant shipwrecks tragically lost during World War II.”

On July 14, 1942, a merchant convoy of 19 ships and five military escorts left Hampton Roads, Va., sailing south to Key West, Fla., to deliver cargo to aid the war effort.

The next day, off Cape Hatteras, N.C., Convoy KS-520 was attacked by German submarine U-576. The convoy fought back with an American warship ramming the U-boat while U.S. Navy aircraft dropped depth charges that sunk the submarine.

Alberg said NOAA’s expedition, taking place in several phases beginning on June 1, will build on work conducted by NOAA’s Office of National Marine Sanctuaries (ONMS) during the past three summers to document and preserve an important part of North Carolina’s history.

The 2011 Battle of the Atlantic expedition survey will be conducted in four phases aboard the ONMS Research Vessel 8501.

- Phase one of the expedition will include a wide area survey in water depths of 100 to 1,500 feet.

Advanced remote sensing technologies, including an autonomous underwater vehicle (AUV) and multiple sonar systems, will be used to attempt to locate undiscovered wreck sites, including the U-576 and the Bluefields, a Nicaraguan tanker the U-576 sunk in a torpedo strike.

- A more targeted survey will be conducted during the second phase, relying on an AUV and multibeam sonar systems to produce 3-D images of wreck sites. Scientists also will be investigating potential fuel leaks at the sites.

- During phase three, scientists will return to selected targets identified in the wide area survey and use a 3-D scanner to create highly detailed models of the wrecks.