A submarine is used as a subsurface naval weapons platform, or as a tool of exploration and recreation. The latter may be manned or robotic, and have a wide range of characteristics and applications. They are usually operated from or with direct reliance on a support vessel of some kind. We've seen them carrying investigators to the deepest oceans, or surveying shipwrecks on the bottom of the sea.
The former are usually sophisticated naval vessels capable of great range and extended independent operation. They can carry torpedoes to sink other vessels, or guided missiles to be launched at distant targets to deliver nuclear payloads. The newer munitions include cruise missiles which can be launched from the submarine, or anti-ship missiles which can also be launched from below the surface. Certainly there are a number of instances of "spooks" working with the submarine service in a number of espionage or "black ops" projects. It could be the insertion of a SEAL team, or the gathering of intelligence in various ways.
Wood was used to make the first submarine
A submarine is only used under water.
they were used in wars
The submarine is under water.
A submarine was used to monitor enemy activity and then to attack by using large torpedoes.
The object used to view the outside from inside the submarine is called a periscope.
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This is an old and a common term. The torpedo has been used since the first submarine's were used in war time.
submarine
it was Germany.
Submarine - A ship designed to travel underwater used for exploration and warfare. Submarine - A sandwich that is shaped like the submarine ship, also known as a grinder or hoagie.
An RC Submarine is a submarine purchased at a toy or hobby store that is run by remote control. If you want to see a sample of an RC Submarine you can find one here: http://www.amazon.com/Swimline-RC-Submarine-27-MHz/dp/B0037M4Q3A