There are over 200 submarines in the world currently. Of these, North Korea has the most with 78 and the United States is second with 72.
There are literally hundreds of types of submarine robots. All major countries of the world develop them.
United States Submarine Operations in World War II has 577 pages.
Submarines are made in many places all over the world
Virginia class submarine
David Bushnell launched what is regarded as the world's first submarine.
The world's first atomic powered submarine was the USS Nautilus.
Depends on the type of submarine...
The USS Nautilus (SSN-571) was the world's first operational nuclear submarine.
Only one US submarine sank in World War One.
The submarine you are thinking about was the USS Nautilus. It was the world's first nuclear powered submarine and commissioned into the US Navy in 1955
A U-boat was a submarine used by Germany in World War 1 and World War 2.
The Submarine Caper has 187 pages.