@wellerstein Hi, weird question, do you have any idea what portion of the global nuke arsenal has radar triggers? Am giving a guest lecture to ROTC milhist class next week RE signal and electronic war with radio waves.
Probably almost all of them? My guess is that practically all US and Russian warheads likely have complex AF&F systems that allows for airbursts and could plausibly called radar fuzes (which is what I assume you are asking about). China, UK, & French probably similar.