Flatboat

A flatboat is a rectangular flat-bottomed boat with ^{[notes 1][1]} square ends used to transport freight and passengers on inland waterways. The flatboat could be any size, but essentially it is large, sturdy tub with a hull.

A flatboat passing a long cigar-shaped keelboat on the Ohio River.

A flatboat is almost always a one-way vessel, and is usually dismantled for lumber when it reaches its downstream destination.^{[notes 2]}