A command ship is like a big house or a castle that someone very important, like a king or queen, lives in. But instead of people living in it, it's a really big ship that important people use to travel around and do important things. The people who use the command ship are like bosses because they have a lot of power and need a big space to work and talk to other important people, like generals and captains. The command ship has a lot of special rooms where different important people can work on different tasks. It's also really strong and can handle rough waves in the ocean or storms. So, it's like a big, fancy office and home, all rolled into one super strong and powerful ship!