4) Road To Pripyat:

After completing 'Investigate Stingray 1', talk to Pilot. He will tell you he cannot take you to Pripyat directly but mentions a contact who knows about tunnels. You are tasked with searching the administration block of the Jupiter Plant for details.

Head to the Jupiter Plant and enter from the south. Follow the road south then east to find an entrance to the administration building.

Ascend the stairs until you reach the correct floor. Dogs will attack; eliminate them.

Enter a room and retrieve the "folder with the orders" from a desk. This updates the mission.

Proceed to the laboratory building to the south. Exit the administration building and take the walkway across to the opposite building.

Go to the end of the hallway and find the "notebook sheet" on a shelf. Grab it to update the mission.

Return to the building opposite the administration block and locate the spot marked on your map. In a small room at the far end, find the "delivery schedule" on some boxes. Grab it to trigger the next part of the mission.

Go back to the Jupiter Plant and enter from the south. Navigate through to the main hanger (where the Stingray 4 helicopter crashed).

Kill the two pseudodogs that appear in the hanger.

Retrieve the "Letter Concerning The Deliveries Of Item 62" from a desk. This updates the mission.

Enter the building in the southeast of the plant. Go inside and ascend the stairs to a small room.

Find and grab the "Underpass Schematics" from a shelf.

Return to the Jupiter Plant and locate the control room marked on your map.

Enter the control room and grab the "duty shift log" from the desk. This triggers the next phase.

Follow the map through the hanger with the crashed helicopter into a large room.

Enter the control room and grab the "duty shift log" off the desk.

Return to Nitro with all the collected documents. You will lose the "document with notes", "duty shift log", and "underpass schematics". This completes the mission.