Cuba a 'tremendous opportunity,' 11 ports can take ships, Carnival chief says

'There is a lot of pent-up demand to visit Cuba,' Donald told analysts during the company's earnings call. 'We are excited about prospects for Cuba, and it would definitely create the demand we need to drive a relative scarcity of [berth] supply.'

Donald said 11 ports around Cuba are currently able to accommodate ships belonging to the Carnival fleet. However, there are size restrictions.

The Havana port, for example, could not take big vessels. It has a relatively shallow draft and cannot be dredged because of a tunnel, the Carnival chief said.