Overview

In 1623 Dutch inventor Cornelius Drebbel (1572-1633) invented the first submersible that could remain underwater for an extended period of time, be propelled through the water, and be steered. Although this invention was not capitalized upon for more than two centuries, Drebbel's submersible marked the first step towards submarine warfare and caused quite a stir in many circles at the time. Today, nearly four centuries later, the submarine is a powerful tool for research and a potent weapon in war.

Background

As legend has it, in 332 B.C. Alexander the Great descended to the bottom of the sea in a glass diving bell, accompanied by two companions and lunch. Although likely a legend only, this is the first record of anyone entering the water for longer than they could hold their breath, and it was not to be repeated (or at least, not written...