MOBILE, Ala. (AP) - A disabled Carnival cruise ship carrying 3,143 passengers and 1,086 crew members was slowly being towed across the Gulf of Mexico to shore Thursday, four days after an engine-room fire disabled the ship's propulsion system and cut most of the vessel's power.

Here are key moments in the Triumph's ill-fated voyage:

- Feb. 7, 2013 - The Triumph departs Galveston for a four-day Caribbean cruise.

- Feb. 10, 2013 - A fire erupts in the ship's engine room, disabling the vessel's propulsion system and knocking out most of its power. It is set adrift 150 miles off the Yucatan Peninsula.

- Feb. 11, 2013 - Carnival officials say the ship has drifted so far north it will be towed to Mobile, Ala. instead of Progreso, Mexico. Tugboats arrive.

- Feb. 12, 2013 - National Transportation Safety Board announces it has opened an investigation into the engine-room fire.

- Feb. 13, 2013 - Carnival officials announce they have canceled a dozen more scheduled voyages for the Triumph.

- Feb. 14, 2013 - When the ship is within sight of Alabama, the tow gear of one of the tugboats breaks. A new tugboat is secured but once the towing begins, the towline breaks. The line is repaired and the Triumph resumes its journey to Mobile.