The Triumph cruise ship had 600 crew members and 200 contractors working on it at the time of the incident, according to Carnival.
Carnival attributed the incident to "strong winds that reached speeds exceeding 70 miles per hour during a severe storm in Mobile, Ala." The company said it's "thoughts and prayers are with the missing shipyard employee and the family."
The initial stranding of the cruise ship drew national attention — and calls for investigations from lawmakers.
The ship became debilitated after a fire in the ship's engine room caused it to lose power. As a result, the Triumph, which was carrying 4,000 passengers at the time, was stranded in the Gulf of Mexico for four days.
Passengers onboard complained to media outlets about squalid conditions on the ship, which they attributed to bathrooms malfunctioning and food spoiling without refrigeration.
After the February incident, Carnival offered refunds and vouchers for future cruises to passengers who were on board the Triumph during that incident.
The company said late Wednesday evening that it was confident the Triumph was properly secured now.
"Lines have moored the Carnival Triumph, and, as a precaution, tugboats will remain alongside the vessel," Carnival tweeted.