How fast a cruise ship goes, defined as its speed through the water, is commonly measured in knots, with one knot equating to 1.15 miles per hour or 1.85 kilometers per hour. For perspective, an average speed for a modern cruise ship is around 20 knots, enabling it to traverse approximately 23 miles (37 kilometers) in an hour.
Cruise ship speed is significant because it influences itinerary planning, determines onboard activities and amenities, and impacts environmental impact. Historically, the introduction of gas turbines in the 1960s revolutionized cruise ship propulsion, leading to faster and more efficient vessels.