Synthetic Aperture Sonar on Unmanned underwater vehicle (UUVs) and AUVs is transforming Mine Countermeasures and Undersea Warfare

SOund Navigation And Ranging or SONAR is a technique of distance measuring between detector and an object base on sound reflection. The distance can be calculated from propagation time and speed of sound in specific mediums. For military, Sonars are the eyes and ears of ships or submarines in water used to detect, locate and identify objects in water. They are used for underwater navigation, especially by submarines and surveillance.  Sonar systems can also be used to realign inertial navigation systems by identifying known ocean floor features.