Earlier this week, Carnival Cruise Lines President and Chief Executive Gerry Cahill said the company had launched a comprehensive review of its entire fleet.
It comes after a fire crippled the Carnival Triumph in the Gulf of Mexico last month.
A Carnival Cruise Lines ship is stuck at port in St. Maarten in the Caribbean with equipment trouble.
Last month, 4,200 people aboard another Carnival ship were stranded for almost five days, after a fire in its engine room.
Passengers on the Triumph described "hellish" conditions including being forced to sleep in tents on deck and due to limited food being reduced to eating cold onion sandwiches.