A barge is defined as a type of marine vessel that's mainly used for cargo transportation. They don't move independently like a boat; they float and are towed or tugged by other vessels. Barges are flat-bottomed to ensure maximum cargo capacity and are used in lakes, canals, and inland waterway, and often at seaports.

Jetty, any of a variety of engineering structures connected with river, harbour, and coastal works designed to influence the current or tide or to protect a harbour or beach from waves (breakwater).