Just curious if anyone may have an answer. I feel like a comparison to the U-2 would purposefully turn on their transponder around the DMZ because they’re like ‘Hey! We are here btw.” Though, regarding this CN-235 would there be a reason that it most likely only occasionally are identified over certain areas on radars. Is it just radar capabilities or certain airspaces?
[“Random” site note: obviously the CN-235 is supposedly special forces, so (again) definitely makes sense that it may not show up on FR versus Ads-B.]