Also - I have noticed that some cruise lines are rather parsimonious with their wine servings. Celebrity & Royal Caribbean will barely pour you two fingers.
I do like the fact that Carnival measures every wine portion in a small glass beaker before pouring it into the glass, and that is usually comes out to almost four fingers.
I am the editor, but I also speculate, ask questions and play devil's advocate. I reserve the right to change my mind.