Most cruise ships travel at a speed of around 25 miles per hour when out on the ocean or at sea.
However sometimes a cruise ship may stop in the middle of the ocean for a bit before cruising on which has happened to a cruise ship when I went on.
It could have been that particular cruise ship that decided to stop out in the middle of the ocean for a few hours so we could see some sights before moving on.
Although most cruise ships will continue on at 25 MPH or sometimes slower.
Most cruise ships will travel between 400 to 600 miles in one day depending on the cruise.