me when machine guns and trenches caused a stale mate war fare. Armored cars were already in use. Military heads realized that by crossing an armored car with the agricultural tracks used in farming, a vehicle that could enter enemy space and be protected could be developed. The first tank to enter the war was of British origin and was known as the Centipede, but later called the Big Willie or Mother. It made its debut in Fille and took a crew to operate it. A coordinator commander, one to change the main gears, and at least two, called gearsmen, to control the tracks. By the end of the war Britain had twenty-six hundred tanks who were up against Frances three thousand seventy of a lighter use. Still, protection in the field wasnt the only kind needed. During 1910 and 1915 two large ocean liners carrying passengers, many Americans, were sunk by an accident in the name of war. A detecting device was needed for the vast ocean to scan any under water dangers. And what better time to develop this type of detector then in a time when the type of technology could determine a countrys status (Asimov 98-101). Ocean warfare during this time became very popular as a means to destroy an opponent without much loss. That left many people intent on the idea to create a detection device that would stop surprise attacks and help ocean liners from colliding with hidden objects at sea. Sonar was developed in 1916 by the French scientist Paul Langeuin originally as a method for ships to detect icebergs. It was found this device could be used on war ships as well to detect submarines (The New Illustrated Science and Invention Encyclopedia, 60). The word sonar was derived from the worlds sound navigation and ranging. It worked as it still does or the principle of echo location. Acoustics or sound waves , which are mechanical vibrations, travel through the water and bounce off nearby objects. The waves are reflected back to the sending ...
