A Carnival spokeswoman explains that "when Holiday docks at Mobile, it enters the channel, sails past the terminal, turns around and then docks. It was during the turning maneuver that the problem occurred."
At that point, she adds, Holiday's turning maneuver was impacted by a strong current and a simultaneous loss of power in its port-side engine. This disabled Holiday's bow thrusters and caused the ship to drift into some pilings. A tug was assisting the ship at the time but did not have enough power to prevent the collision.
Repairs to the ship have already been concluded with no loss of sailing time -- the dent was painted over and divers worked to smooth out the propeller blades. There was minimal damage to the barge loader itself and Carnival is working with Mobile to facilitate repairs.