Wow, I thought girls are not interested in yagis I guess I was proven wrong, good job on teaching them, dont stop :) PS: some pointers on how did u get them interested in this stuff? PPS: where did u buy parts to built ur yagi?
@christheghostwriter A Radio Frequency Antenna is called a Yagi or "Beam" is being used to shape Low power radio waves into a long distance patern. This beam antenna will allow low power radio waves to reach long distances as long as they are line of site. In this case the repeater they are reaching is at 300 feet but far away.
@christheghostwriter be able to communicate on the local fringes of communication with people that are close enough to possibly help you or share local intelligence. Also used for storm spotting communications in a disaster. brushbeater.store/products/the-guerrillas-guide-to-signals-intelligence Great beginning book.