Update:

While the ship's sudden loss of propulsion could be explained by bad fuel, and has been in many cases, the fact that the entire vessel lost power at once is more suspect, and has yet to be explained. Although propulsion was provided by a Hyundai main engine, MV Dali also has five auxiliary generators which could have provided power for steering in a conventional loss of propulsion, suggesting its electrics, and not its engine, were the problem. A sudden tack to starboard, as evidenced in the video " misinterpreted by conspiracy theorists as an attempt to steer the vessel deliberately toward the bridge pier " has since been explained by the action of the Baltimore pilot, who dropped the port anchor in an attempt to miss the pillar.