I'm thinking the auxiliary power failed at the worst time. Or they were stuck in reverse. The ship was being piloted in reverse out of the South Street Seaport into the East River. The crew was up in the rigging preparing to drop the sails. They caught hell. Once they lost control the incoming tide just took over and the rest is what you see. Then after the masts broke off, it kept going until it got jammed up at the Manhattan Bridge. I don't know what kind of auxiliary power they had. On a small sail boat, most do have either a retractable drive or an outboard on a swing mount. I'm not sure what a large ship would have. A fixed propeller shaft/rudder would create a lot of unwanted drag. Pre-Industrial Revolution ships would of course have only oars. Whatever they had- it failed and someone was at fault. Either way some heads will probably roll over this. What I want to know is why that Tug that was right there- did not jump in to help. Or is he towing it?!? If the ship had no aux power- it would require a tow to maneuver.