Stalker: Call of Pripyat → Skat-3
We emerge at the burnt-out farmstead, surrounded by "Hot" anomalies. Watch the path Noah takes, then follow him. Don't forget the bolts! Reach the edge, push off, and jump into the "Teleport." (Be careful—get a good boost, or you'll have to jump again.)
There's no easy way to get to the third helicopter, so we'll go to Stalker Noah, who lives in his "ark," just south of the port cranes. He keeps a tamed dog, Lassie, in his ship. We talk to him, ask about the helicopters, and agree to let him take us to the Plateau.
There's a snork lair near the target, so it's best to destroy them first before they do the same to us. After that, we go to inspect the Skat-3 helicopter. We receive information that both engines failed mid-flight, and in the onboard computer we find a map with evacuation points "B2" and "B205" first.
See also:
Quests: Hunt (Swamp Bloodsuckers)