Do you know that a cruise ship  is a passenger ship used for pleasure voyages?
I did! I've been on several cruises before! It is very nice.
Move of people in a cruise ship involves returning them to their original destination
Yes definitely. It is only meant to be a short trip to a destination via water.
There are some ship that  makes 2–3 night round trips without any ports of call.These types are called nowhere voyages
Oh I didn't realize that!
of call.
In contrast, dedicated transport-oriented ocean liners do "line voyages" and typically transport passengers from one point to another, rather than on round trips. Traditionally, shipping lines build liners for the transoceanic trade to a higher standard than that of a typical cruise ship, including higher freeboard and stronger plating to withstand rough seas and adverse conditions encountered in the open ocean, such as the North Atlantic. Ocean liners also usually have larger capacities for fuel, food, and other stores for consumption on long
Cruise ship
A cruise ship is a passenger ship used for pleasure voyages when the voyage itself, the ship's amenities, and sometimes the different destinations along the way (i.e., ports of call), form part of the passengers' experience. Transportation is not the only purpose of cruising, particularly on cruises that return passengers to their originating port (known as "closed-loop cruises"). On "cruises to nowhere" or "nowhere voyages", cruise ships make 2-to-3 night round trips without any ports