The National Transportation Safety Board determines that the probable cause of the June 2012 allision between bulk carriers Mary Ann Hudson and Star Grip was the pilot’s ineffective handling of the Mary Ann Hudson and his ineffective use of the two tug boats to maneuver the vessel around the Star Grip’s crane arms, which were extending into the navigable waterway. On June 6, 2012, at 0530 central daylight time, the underway bulk carrier Mary Ann Hudson collided with the moored bulk carrier Star Grip while the Mary Ann Hudson was being moved from City Dock 21 to City Dock 29.