| Dessription |
One of the most critical problems encountered by the Allies early in World War II was the submarine menace. Almost five thousand merchant ships were sunk and more than twenty million tons of war supplies were lost by enemy action. The struggle against enemy submarines was successful because we were able to detect and locate them whether they were surfaced, submerged, underway, or lying in wait by using “SONAR”. The word "SONAR" abbreviates SOund, Navigation, And Ranging, and includes all types of underwater sound devices used for listening, depth indication, echo ranging, ship-to-ship underwater communication, and other uses. The importance of sonar in naval warfare cannot be overemphasized. This text is one of the chapters of a complete book on Sonar. Due to database storage limitations the complete book can not be uploaded as a single document. |
