[A930Rocket]

From CNN:

According to a timeline provided Wednesday by the NTSB, alarms on the ship blared just before 1:25 a.m. ET Tuesday as the ship moved through the channel as it left the port. About that time, the voyage data recorder ceased documenting things like audio, GPS positions and speed. (Video available before the NTSB released its timeline shows the ship’s lights going out at 1:24 a.m., before turning back on, and then flickering off and on again between 1:26 a.m. and 1:27 a.m.)

The data recording resumed at 1:26:02 a.m. – about 63 seconds after the alarms started – and the pilot could be heard issuing steering commands to the crew, according to the NTSB timeline.

At 1:26:39 a.m., the pilot sent out a radio call for help from tugboats, which typically help ships in earlier stages of leaving port. About the same time, a pilot association dispatcher phoned the Maryland Transportation Authority duty officer regarding the ship’s lights blacking out, according to the NTSB.

At 1:27:04 a.m., the pilot ordered for one anchor to be dropped and gave additional steering commands.

The pilot radioed just a short time later that the ship had lost power and was closing in on the bridge. A duty officer for the transportation authority, using radio, ordered other transportation authority officers to shut down traffic to the bridge – those officers were already on site because construction work was happening there, the NTSB said.

At 1:29:33 a.m., the ship’s recorder captured sounds consistent with the vessel striking the bridge, the NTSB said. Six seconds later, the pilot reported to the Coast Guard by radio that the bridge was down, the NTSB said.