When searching for cruises, there are usually descriptions of the rooms you can book but in the list of amenities there is no mention of power outlets. As spending a week or more on the sea requires to have some activities (and today we use a lot of electronic devices), I am wondering first if there are multiple plugs in the rooms, I expect at least 2 since the rooms are for 2 people.
I am also wondering what kind of plugs there are, i.e. is it the North American, UK or European plug system (or a different one) that is used? I expect that some shops will sell that on board of the cruise ship but I would prefer to be prepared.
So to sum up, are there multiple plugs in transatlantic cruise ships, and what type (North America/UK/Europe/other) are they? Or is the plug type depending on the country the ship was built in?
EDIT: As asked, let's say for example the cruise would be on the Costa Luminosa