Answer :

The tracking devices makes use of the Global Positioning System ( GPS ). Nowadays chips are  embedded within the horn of the rhino, as well as one more chip elsewhere. This will help to establish a trail of evidence that can be used to more effectively bring charges against poachers. Even tracking devices are fitted in the collars of the rhino to detect poachers.
amru
gps are used to arrest poachers and to find location of rhinos