Attrition
While running away from my original location, I managed to take out my walkie-talkie and contact my Father while I was escaping the area. Father himself was actually located quite close to me, as he was scouting the area to prevent an ambush on our previous location. Seeing now that our previous location had been found by our enemies, he did not hesitate and reply in an urgent tone, "Where did the sniper shoot from?"
"Around 1000m away, 5 degrees south, 30 degrees west." I gave a prompt reply after analyzing the trajectory of the bullet within my mind.