Technology played a huge role in WWII. The Radar and Sonar were both a big part of the technology used during WWII. The radar was used to detect distant objects, most importantly aircrafts and ships. The radar would give a great advantage to people as the enemy would be detected without even knowing it. To disrupt radars, enemies would use radar jammers. The radar jammers would be used to interrupt the waves coming out of the radar. After this happens, the radar won't be able to get signals that the enemies are near. The greatest advantage to using the radar is that the enemies will lose the element of surprise. Enemies would sometimes use radar detectors. By using these radar detectors, the enemies could learn more about the radars being used, and get engineers to learn how to bypass the radars. This could help enemies learn where the radars are positioned, and it would make it easier to bypass these radars. Sonar was also a big part of WWII. Sonar devices were used to detect distant objects, such as submarine boats or mines. They would send out sound waves, and then wait back for echoes of the sounds that were just sent out. Sonar is an acronym for SOund Navigation And Ranging.