[Definition] Using radar, sound waves, a magnetic sensor, or a laser the warhead is detonated when the target is within a specified distance. It is often coupled with directional explosion control system that ensures that the explosion sends the fragmentation primarily towards the target that triggered it. [Type] 
Proximity
C o n t a c t
P r o x i m i t y
R e m o t e
T i m e d
A l t i t u d e
C o m b i n e d