a ship floats on the water and a submarine can go underwater and on top of the water
A submarine is a ship that can travel underwater.
your head
submarine.
A submarine best fits the description.
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.
The S.S. United States
A submarine is to spy on ship movements and if necessary sink ships
"The submarine fired a torpedo at the large ship."
5.6 mi
Submarine
The H. L. Hunley was the name of the Confederate submarine that was the first combat submarine to sink an enemy ship.
The Confederate submarine 'H L Hunley' was the first submarine to sink an enemy ship