S.T.A.L.K.E.R. 2: Heart of Chornobyl - Cross the Perimeter (Part 1)
2Cross the Perimeter
Run across the field and go through the opening on the wall. The surrounding area is fairly dark, so use your flashlight (L) to navigate through the field.
Proceed through the sewers until you reach a doorway blocked by wooden barricades. Destroy the barricades by hitting it with the butt of your gun. Don't forget to grab the free Medkit right beside the doorway!
Next, go down the hall and use your knife (1) or weapon melee (V) to destroy the lock on the door. Aim for the lock's body to immediately destroy it (not the shackle).
Run Past the Anomaly
Inside the sewers, wait for the Tesla Anomaly to disappear and then sprint towards the path on the left side. You'll have to be quick since the anomaly will reappear again after a while.
There will also be some dead soldiers on the ground along the sewer drainage. You can loot an AKM-74u, as well some bandages from them.
From the path you just entered, proceed ahead and you should see an exit that will lead you out of the sewers. As soon as you leave, be prepared to fight as you'll encounter some mutants along the way.
Find and Search Nehoda's Body
Immediately after descending the ladder, turn right and exit through the hallway. Make a left and circle around until you find a dead scientist named Anton Nehoda. Loot Nehoda's body to get the PDA and then listen to it.
Obtain Information on the Scanning Points
Return to the ladder earlier and enter the room beside it - the one with a red light and another dead scientist inside. Interact with the laptop on the table to copy the data.
A man on the radio will then contact you asking what you'll do with the coordinates. Tell him that you'll figure it out yourself.