Flat-bottomed craft are vessels that have a flat bottom and are used for various purposes. The most common type of flat-bottomed craft is the RAFT, which is a simple boat made from logs or other materials that are tied together. A SCOW is another type of flat-bottomed craft, which is a large, open boat with a flat bottom and square ends. Lastly, dories are small, flat-bottomed boats that are usually propelled by oars or sails. All of these types of flat-bottomed craft are used for fishing, transportation, and recreation.