Questions and answers about ERM scripts for WoG.

To comrades who know ERM better than I do, a question:)
If you please: How do I get the coordinates of an object that a hero has visited? For example, a hero visits an Obelisk; how can I immediately get the coordinates of that Obelisk?
I was looking for a similar answer to my question in the script about the mega well, where it talks about tunnels. But, to be honest, I didn't understand the receiver DO and the purpose of the P command in the FU receiver... Some additional variables... I didn't quite grasp what they are for - there are already enough variables. In general, please help me.