Going into the 2nd world war, militaries were exposed to this new technology called the Radar. The radar was used by Navies (especially the U.S. and U.K.) to detect planes and ships that were entering the nation’s coastal zone and detecting objects that passed by their naval vessels. The Navies were able to use radar to plan out strategies to know where enemy ships were before planning out attacks as well as knowing when enemies were coming to attack their vessels.