The US military uses IFF to tell friends apart from enemies, and civilian aviation uses SSR to keep track of planes in crowded airspace. But did you know these two seemingly different systems use the exact same technology?In this video we’ll go into how that tech works and how its used both in civil and military applications.Intro 00:00Bits and Pulses 04:48Mode 3/A 07:00Mode 4 10:50Modes S and 5 13:07Radar playlist: • Radar Explained References:Overview of SSR and IFF: https://ieee.li/pdf/viewgraphs/overvi…DoD paper on Mode 5 IFF: https://www.dote.osd.mil/Portals/97/p…Article on modern IFF systes: https://euro-sd.com/2022/01/articles/…Image of GA Transponder:By Meggar at the English-language Wikipedia, CC BY-SA 3.0, https://commons.wikimedia.org/w/index…