You only need a transponder when flying an aircraft in controlled airspaces (Class A, B, C). You can fly without a transponder in a lot of places as long as you are in VFR conditions and not within 30 miles of most airports. It's just not a good idea. This is why gliders and paramotors can fly without a transponder in VFR conditions.
This is just basic safety for vehicles that can't see each other traveling at 100-1000 miles per hour in conflicting space.
Although it's a little concerning that ADS-B makes it so much easier to identify WHO is flying the planes.
This is just basic safety for vehicles that can't see each other traveling at 100-1000 miles per hour in conflicting space.
Although it's a little concerning that ADS-B makes it so much easier to identify WHO is flying the planes.
https://www.law.cornell.edu/cfr/text/14/91.215