Photograph provided by John Keen
Here is OP1 looking to the Southeast. FSB Hill 4-11 is just off the upper right side of the picture.
Photograph provided by John Keen
This is a TPSI 25 Ground Surveilance Radar system on OP1.
Photograph provided by John Keen
This is another view of OP1 looking to the East. Arillery strikes can be seen on the hill in the background.
Photograph provided by John Keen
Here is the Q-4 Radar system that was located on OP1. The TPSI-25 Radar dome (mushroom shaped) is shown in the upper left.