submarine

Submarine

A submarine is an under water boat that is powered by someone inside. Submarines r a typically large vessel but there are smaller ones called midget submarines and wet subs. Submarines are considered a boat because they were originally released from ships. Submarines were modelled before their main boom in the 19th centry. But submarines were first seriously used during World War 1 by the Navy to attack ships and fire missels. Today submarines are widely used from underwater research and excavation to rescue and repair.

Information Provided by: http://en.wikipedia.org/wiki/Submarines

Picture Provided by; http://www.naval-technology.com/projects/astute/images/8-ssn-astute-submarine.jpg