MOBILE, Ala. — The crippled cruise ship whose sewage-filled breakdown in the Gulf of Mexico subjected thousands to horrendous conditions tore loose Wednesday from the dock where it's being repaired, lumbered downriver and crunched into a cargo ship.

Wind gusts near hurricane strength shoved the 900-foot Carnival Triumph free from its mooring in downtown Mobile, Ala., where the ship was brought in a five-day ordeal that began when an engine fire stranded it off of Mexico in February. Hours later, four tug boats used several mooring lines to secure the ship to the cruise terminal.

A 20-foot gash about 2 to 3 feet wide was visible about halfway up the hull from the water and it wrapped partway around the stern. Underneath the gashed area, two levels of railing were dangling and broken. Electric cables that had been plugged in on shore were dangling from the port – or left – side of the ship. Carnival said damage, though, was limited.

The violent weather Wednesday also blew a nearby guard shack into the water. One shipyard worker was rescued and crews were searching for another, a U.S. Coast Guard spokesman said, but the cruise ship's mishap was unrelated.

Some crew members and workers had been staying on the ship while it was being repaired and people could be seen looking out the windows and on the deck of the ship Wednesday. Carnival said all 800 of its crew members and contractors who were working aboard were safe.

An engine fire disabled the Triumph on Feb. 10 and thousands of passengers were disabled for days. Passengers say they endured terrible conditions on board, including food shortages, raw sewage running in corridors and tent cities for sleeping on deck.

Tugs slowly towed the ship into port in Mobile, Ala., where it has remained under repair.

After the ship escaped, it rested against a cargo vessel. It drifted for a couple of hours before being secured as of 5 p.m., and moved to the Mobile Cruise Terminal, Carnival spokesman Vance Gulliksen said.

Coast Guard officials said they saw no sign late Wednesday of the missing BAE Systems employee who was knocked into the water with a co-worker when near hurricane-strength winds blew their guard shack over. The other man was rescued.

Coast Guard Petty Officer 2nd Class Bill Colclough said the missing man worked for BAE Systems that runs the shipyard. Authorities are unsure of how deep the water is where the men fell in, but the company's website mentions its ship-repairing operation is adjacent to a 42-foot deep ship channel.

The pier where the ship was docked wasn't damaged but one adjacent was when the ship bumped into it, said BAE spokesman John Measell.

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Lucas reported from Atlanta.

Earlier on HuffPost:

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  • The sun sets as the cruise ship Carnival Triumph is towed into Mobile Bay near Dauphin Island, Ala., Thursday, Feb. 14, 2013. (AP Photo/Dave Martin)

  • The cruise ship Carnival Triumph is towed up the Mobile River in Mobile, Ala., Thursday, Feb. 14, 2013. (AP Photo/Dave Martin)

  • The cruise ship Carnival Triumph is pushed towards the cruise terminal along the Mobile River in Mobile, Ala., Thursday, Feb. 14, 2013. (AP Photo/Dave Martin)

  • The cruise ship Carnival Triumph is towed up the Mobile River in Mobile, Ala., Thursday, Feb. 14, 2013. (AP Photo/Dave Martin)

  • People watch from their balconies aboard the Carnival Triumph after it was towed to the cruise terminal in Mobile, Ala., Thursday, Feb. 14, 2013. (AP Photo/G M Andrews)

  • People watch from their balconies aboard the Carnival Triumph after it was towed to the cruise terminal in Mobile, Ala., Thursday, Feb. 14, 2013. (AP Photo/John David Mercer)

  • Passengers aboard the Carnival Triumph walk along the deck before leaving the ship in Mobile, Ala., Thursday, Feb. 14, 2013. (AP Photo/Dave Martin)

  • Carnival Triumph Arrives

    People watch from their balconies and hold up signs aboard the Carnival Triumph after it was towed to the cruise terminal in Mobile, Ala., Thursday, Feb. 14, 2013. (AP Photo/AL.com, Mike Brantley)

  • Passengers of the Carnival Triumph walk to their buses after docking at the cruise terminal in Mobile, Ala., Thursday, Feb. 14, 2013. (AP Photo/Dave Martin)

  • Passengers from the disabled Carnival Triumph cruise ship arrive by bus at the Hilton Riverside Hotel in New Orleans, Friday, Feb. 15, 2013. (AP Photo/Gerald Herbert)

  • Passengers from the disabled Carnival Triumph cruise ship arrive by bus at the Hilton Riverside Hotel in New Orleans, Friday, Feb. 15, 2013. (AP Photo/Gerald Herbert)

  • This undated photo provided by passenger Don Hoggatt, of Dallas, shows makeshift tents on the deck of the Carnival Triumph cruise ship for people to spend the day in and sleep in to escape the stench from the lower decks of the disabled ship.The Triumph arrived late Thursday, Feb. 14, 2013, in Mobile, Ala., after an engine-room fire left the ship powerless off Mexico last weekend. (AP Photo/Don Hoggatt)

  • This undated photo provided by passenger Don Hoggatt, of Dallas, shows the tent city built on the Lido deck of the Carnival Triumph cruise ship for people to spend the day or night in to escape the stench from the lower decks of the disabled ship. The Triumph arrived late Thursday, Feb. 14, 2013, in Mobile, Ala., after an engine-room fire left the ship powerless off Mexico last weekend. (AP Photo/Don Hoggatt)

  • This undated photo provided by passenger Don Hoggatt, of Dallas, shows covered urinals and bagged trash cans for passengers to use in one of the bathrooms aboard the Carnival Triumph cruise ship which became disabled after an engine-room fire left the ship powerless off Mexico last weekend. The Triumph arrived late Thursday, Feb. 14, 2013, in Mobile, Ala., after an engine-room fire left the ship powerless off Mexico last weekend. (AP Photo/Don Hoggatt)

  • The cruise ship Carnival Triumph is moored at a dock in Mobile, Ala., Friday, Feb. 15, 2013. The ship, which docked Thursday in Mobile after drifting nearly powerless in the Gulf of Mexico for five days, was moved Friday from the cruise terminal to a repair facility. (AP Photo/Dave Martin)

  • In this image released by the U.S. Coast Guard on Feb. 11, 2013, a small boat belonging to the Coast Guard Cutter Vigorous patrols near the cruise ship Carnival Triumph in the Gulf of Mexico, Feb. 11, 2013. (AP Photo/U.S. Coast Guard- Lt. Cmdr. Paul McConnell)

  • In a Feb. 12, 2013 photo provided by the U.S. Coast Guard, the tugs Resolve Pioneer and Dabhol, left, tow and steer the 893-foot Carnival Triumph cruise ship in the Gulf of Mexico. (AP Photo/U.S. Coast Guard, Ensign Chris Shivock)

  • In this image released by the U.S. Coast Guard on Feb. 11, 2013, the Coast Guard Cutter Vigorous patrols near the cruise ship Carnival Triumph in the Gulf of Mexico, Feb. 11, 2013. T(AP Photo/U.S. Coast Guard- Lt. Cmdr. Paul McConnell)

  • This July 27, 1999 handout file photo provided by Carnival Cruise Lines shows the MS Carnival Triumph departing New York harbor, on her inaugural voyage. Carnival Cruise Lines said Sunday an engine room fire had disabled the cruise ship Triumph about 150 miles off the Yucatan Peninsula with 3,143 passengers and 1,086 crew members on board. (AP Photo/Carnival Lines, Andy Newman, File)

  • Cruise Ship Loses Power In Gulf Of Mexico

    In this handout from the U.S. Coast Guard, the cruise ship Carnival Triumph sits idle February 11, 2013 in the Gulf of Mexico. (Photo by Paul McConnell/U.S. Coast Guard via Getty Images)