Coal, gas or plutonium, depending on type of engine installed on the ship.
That is a question that cannot be answered exactly. Different cruise ships of different sizes use different amounts of fuel. I can tell you that there are some cruise ships that use no fuel. There are several large cruise ships that are powered by sails.
Fuel for ships and engines.
Different ships use different fuels according to their needs. Most large cargo ships use bunker fuel which is a form of crude oil. Some ships use diesel fuel. Some modern commercial ships are employing nuclear fuels. Some military ships use diesel for their normal operating engines and for more speed they will use jet fuel for gas turbine engines.
Space ships bring their fuel with them from the start.
Cruise ships run on diesel fuel to power generators while in port, and heavy fuel oil while sailing.
Petrol is a type of fuel derived from crude oil through a process called fractional distillation. It is different from fuel oil, which is a heavier type of fuel typically used for heating or powering ships and large machinery.
Different ships have different cruising speeds, most cruise ships cruise at about 20 to 25 knots (37 to 46 km/h) Cruise speed is the most fuel efficient speed, not the fastest speed a ship can go.
Bitumen is not commonly used as fuel in ships. Ships typically use marine diesel or heavy fuel oil as fuel due to their higher energy density and compatibility with ship engines. Bitumen is more commonly used in road construction and waterproofing applications.
Coal
different ships can hold different amounts of people
Ships are made in many different places.
How were carvels different from other ships? How were carvels different from other ships?