Defense Industry Expedition

  Here is the English translation of the explanation regarding the purpose, characteristics, development stages, and latest trends of SONAR. 1. Purpose and Characteristics of SONAR Primary Purposes Detection and Identification: Locating and classifying underwater objects such as submarines, mines, schools of fish, or seafloor topography. Range and Bearing Measurement: Calculating the precise distance and bearing (Line of Bearing) to a target based on the travel time of sound waves. Underwater Communication: Exchanging information between submarines or between surface ships and submarines using sound waves as the medium. Navigation Safety: Ensuring vessel safety by measuring water depth and avoiding underwater obstacles. Key Characteristics Influence of the Medium:  Unlike radio waves in the air, sound waves in water are subject to refraction and attenuation based on temperature, salinity, and pressure. Analyzing environmental data is critical. Active vs. Passive SONAR: Act...