Quick answer: the helicopter is a scripted atmosphere event. Since the 1.0 release, Jianyu helicopters take off and leave from bases around the map and occasionally hover over player structures to check on them — it's the main antagonist watching you, not a rescue and not something you can interact with.

What's actually happening

It's Jianyu's team

Jianyu Zhang — the game's main antagonist — runs a Sahara Therapeutics expedition on the island. The helicopters belong to his search party, not to anyone coming to save you.

It marks points of interest

Helicopters hover over abandoned Jianyu camps before you find them — spotting one overhead is a hint there's a camp worth looting nearby.

It checks on you

Occasionally one will hover over structures you've built, look at you and fly off — pure story flavor meant to make you feel watched.

You can't use it

No interaction, no extraction, no shooting it down — it's an event, not a mechanic. It still spawns even after the story is finished.

What it means for your base

QuestionAnswer
Does it bring enemies?Indirectly — the noise can draw cannibals and mutants toward your position, so a flyover can mean more visitors after it leaves.
Does it attack?The helicopter itself doesn't attack you on flyovers — Jianyu shoots in scripted cutscenes only.
Can I follow it?You can — it travels between Jianyu camps and bases, which are lootable points of interest marked by blue GPS trackers when you get close.
Does it stop after the ending?No — players report it keeps spawning even after the story concludes, as a world event.

FAQ

Is the helicopter a rescue?

No — it belongs to Jianyu's expedition. It's checking on your structures, not offering a way off the island.

Can I shoot it down or board it?

No — it's not a physical vehicle you can interact with, just an event that flies a route.

Why does it hover over Jianyu camps?

The camps are abandoned expedition sites — the flyover both marks them for the story and hints at their location for you.

When was this added?

With the 1.0 release — the patch notes added helicopters that take off from bases around the map and check player structures.