NORFOLK, Va. -- The Norfolk District debris removal vessel MOBJACK sits moored at the district's dock as the Container Ship Octavia arrives at the Portsmouth Marine Terminal across the Elizabeth River in Portsmouth, Virginia, July 28, 2017. The MOBJACK's mission is to patrol the federal navigation channels removing debris, which could damage ships, like the Octavia, as they navigate to and from the various port facilities in the Hampton Roads region of Virginia. (U.S. Army photo/Patrick Bloodgood)