“Hercules also offered the ability to attack pre-located ground targets, after feeding in the coordinates in an operation that took about five minutes. For these missions the computer used the MTR to guide the missile to a point above the target, then commanded it to dive vertically while measuring any changes in trajectory as it fell. The missile would eventually pass out of line-of-sight with the MTR, so final arming information was provided during the dive, and the warhead was triggered by a barometric fuse.” wiki
Comment: In one of the many US Army schools that I attended I was told that this SAM was actually the most accurate intermediate range ballistic missile that we had at the time. Surprise!
This is not to say that the Ukrainians deliberately put this thing into Poland. No, what I am saying is that the capacity of what they have to go ballistic and smash the s–t out of something there is easy to imagine. pl