BALTIMORE — Here’s what we know about the Dali, the 948-foot-long cargo vessel that struck the Francis Scott Key Bridge early Tuesday morning, collapsing the bridge:

Previous port collision

The Dali, which was built in 2015, had previously been in an accident at a Belgian port.

In July 2016, the ship struck a quay while leaving the Port of Antwerp, according to Vessel Finder. The collision caused significant damage to its hull, requiring the vessel to be docked and detained at the port until it was operational again.

Shipper cited

The Occupational Safety and Health Administration ruled last summer that the Danish cargo company Maersk Line Limited had violated the Seaman Protection Act by firing an employee who had complained about safety violations to the U.S. Coast Guard. The Dali was carrying Maersk customers’ cargo at the time of the Tuesday collision, though no Maersk crew or personnel were on board. The Seaman’s Protection Act ensures that employees are not punished or retaliated against for reporting maritime safety violations to the U.S. Coast Guard or other federal agencies.

In an 11-page letter dated July 20, 2023, OSHA Assistant Regional Administrator Michael Mabee said Maersk had violated maritime law and ordered it to reinstate the unnamed employee and reimburse his legal fees, damages and back pay totaling $372,597.07. The employee had complained that the ship had a leak and needed repairs to its cargo hold bilge system before Maersk fired him in March 2021, according to OSHA.

In an emailed statement, Maersk spokesperson Kevin Doell said the company disagreed with the OSHA finding, which was first reported by investigative outlet The Lever, and intended to appeal “this flawed decision.”

“Maersk Line Limited is proud of its safety culture and its highest priority remains the safety and security of our mariners and shoreside colleagues,” Doell said.

Ship arrived Friday

The Dali landed in Baltimore on Friday, according to Andy Middleton, director of the Apostleship of the Sea.

The director of the Catholic ministry, which assists crew members while their ships are docked at the Port of Baltimore, had taken the Dali’s crew members shopping at Walmart. They were anticipating a 28-day sojourn to Colombo, Sri Lanka, and planned to sail around South Africa to avoid unrest in the Red Sea.

“We’re a friendly face when they come into the Port of Baltimore,” Middleton said of crew members whom Apostleship of the Sea assists. “I’m glad we were able to provide services for them before they sailed.”

Cause of the collision unknown

It’s not clear what exactly caused the ship to strike the bridge’s support column. The ship left the port around 1 a.m. and collided with the bridge at 1:27 a.m. It was traveling at 8 knots, or about 9 mph.

Clayton Diamond, executive director of the American Pilots Association, confirmed earlier news reports that the ship had a “complete blackout” and lost power to its engine and navigation equipment a few minutes before the collision. It never regained power, Diamond confirmed via email.

Crew members on board issued a “mayday” alert before impact, allowing authorities to halt traffic from entering the bridge before it crumbled.

The Dali was cited for deficiencies with its propulsion and auxiliary machinery during a June 2023 inspection at the Port of San Antonio in Chile, according to the Electronic Quality Shipping Information System, a shipping information website.

The National Transportation Safety Board is investigating the collision with assistance from the Coast Guard. The probe will examine problems with the ship’s power, its structure, and design, according to Jennifer Homendy, the chair of the safety board.

Darrell Wilson, a spokesperson representing Dali’s owner, Singaporean firm Grace Ocean Pte. Ltd., and manager, Synergy Marine Group, said the two firms were “fully cooperating” with federal and state government agencies.

The Dali’s owners said all of its 22 crew members and two pilots were accounted for.