A large articulated tug and barge (ATB) unit, identified by "DBL 104" painted on its red sheer line, is underway on open water under a clear blue sky

A large articulated tug and barge (ATB) unit, identified by "DBL 104" painted on its red sheer line, is underway on open water under a clear blue sky. The vessel features a dark hull, a red upper hull stripe, and white superstructures. A multi-deck control house, consistent with a tug's wheelhouse or the barge's command center, is visible towards the vessel's port bow (left side). Another superstructure with radar masts and a red flag is present at the stern of the barge (right side). In the distant background, along the shoreline on the left, industrial buildings with multiple stacks are visible, identifying the location as Boston Harbor, specifically consistent with the Chelsea Creek or Everett area in Boston, Massachusetts, United States. The water is deep blue with light surface ripples, reflecting the bright daylight conditions. The top of the frame is partially obscured by a dark grey, blurred horizontal object, likely part of the viewing platform from which the image was captured. No individuals are visible.