Restoring fuel flow into the New York area a top priority, but barge deliveries hampered by obstructions. NOAA Ship Thomas Jefferson mobilized through the night to New York Harbor where they began surveying at 3:12 a.m. 1, November, looking for the sunken containers, debris, and shoaling that pose dangers to ships and lives. In the darkness, using high tech side scan sonar equipment, Thomas Jefferson conducted the hydrographic survey of the designated areas on the Hudson River. With the information provided by the Thomas Jefferson's survey, the U.S.