The operation of sonar is based on the described laws of wave mechanics and therefore the propagation of a wave in a medium. These laws were fundamental at the beginning of the last century to bring innovation in the field of navigation; the goal of physicists and engineers was in fact to innovate the already existing sonar prototypes (invented around 1906) which had not been able to avoid a tragedy such as that of the Titanic, and also needed improvements in the technologies that constituted the submarine instruments of the beginning of the century
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