A submarine is any naval vessel that is capable of propelling itself beneath the water as well as on the water's surface. First devised as a watercraft in the 19th century, the submarine was quickly adopted by navies around the world for attack and defensive purposes. But a submarine is an inherently dangerous environment to live and work in, and when something goes wrong the likelihood of escape is very limited.
Click through this gallery to explore some of history’s most catastrophic submarine disasters.