My navy days were not in aviation, so I can’t speak with any real certainty, but at the time, I had heard fifty knots.
The fastest large ship ever was the liner United States IMHO.
It takes tremendous power increase for every knot past the mid 20s. I know there are plenty of variables in marine engineering and some of the essays on the subject are pretty fascinating. Like I understand the stuff Ha Ha!
Loaded weight, how it is distributed in the ship, how clean is the hull, is the power plant at peak efficiency, what is the sea state and wind, how good are your dudes that are sweating away down in the bowels, and heck knows what else.
The Iowa class BBs could do 32-33 which was really moving for a battleship. The fastest big pax ship and only true ocean liner today the Queen Mary 2 did 30 knots on acceptance trials IIRC. She is the first four propeller civilian ship in fifty years.
Read a curious thing about steam power plants; they make better power in cold water. So the Missouri, say, would be a bit faster near the Aleutians than near Hawaii.