Barge often refers to a flat-bottomed inland waterway vessel which does not have its own means of mechanical propulsion. The first modern barges were pulled by tugs, but on inland waterways, most are pushed by pusher boats, or other vessels. The term barge has a rich history, and therefore there are many other types of barges.
"Barge" is attested from 1300, from Old French barge, from Vulgar Latin barga. The word originally could refer to any small boat; the modern meaning arose around 1480. Bark "small ship" is attested from 1420, from Old French barque, from Vulgar Latin barca (400 AD). The more precise meaning of Barque as "three-masted sailing vessel" arose in the 17th century, and often takes the French spelling for disambiguation. Both are probably derived from the Latin barica, from Greek baris "Egyptian boat", from Coptic bari "small boat", hieroglyphic Egyptian D58-G29-M17-M17-D21-P1 and similar ba-y-r for "basket-shaped boat". By extension, the term "embark" literally means to board the kind of boat called a "barque".
In Great Britain a merchant barge was originally a flat bottomed merchant vessel for use on navigable rivers. Most of these barges had sails. For traffic on the River Severn the barge was described as: The lesser sort are called barges and frigates, being from forty to sixty feet in length, having a single mast and square sail, and carrying from twenty to forty tons burthen. The larger vessels were called trows. On the River Irwell there was reference to barges passing below Barton Aqueduct with their mast and sails standing. Barges on the Thames were called west country barges.
During the Industrial Revolution, a substantial network of narrow canals was developed in Great Britain from 1750 onward. These new British canals had locks of only wide. This led to the development of the narrowboats, which had a beam of no more than . It was soon realized that the narrow locks were too limiting. Later locks were therefore doubled in width to . This led to the development of the widebeam.