Friendly Skies

Friendly Skies unlocks when you destroy 16 Anti-Aircraft Cannons in solo play. AA sites also pay out Depleted Uranium and open the sky for your aircraft, so they are worth hitting anyway.

Category: Combat
How to unlock: Blow up 16 Anti-Aircraft Cannons (solo only).
Players who have it: 17% on Steam

Unlocked by

Anti-Aircraft SitesAnti-Aircraft Sites are FND flak posts that shoot down any aircraft flying over their patch of Yara. Destroying them opens the sky for flying and Air Drop, and they are your main source of Depleted Uranium for Supremos and Resolver weapons.

Good to know

Cannons destroyed in co-op do not count.
Yara has 26 anti-aircraft sites, named after Greek letters plus Castillo Prime.
One explosive shot, or two or three grenades, usually takes one out.
AA sites are the main source of Depleted Uranium for Resolver weapons and Supremos.
Esperanza has two hidden AA defences that can never be destroyed, so do not waste time on them.
16.9% of Steam players have it.

How to unlock it

1. Find an Anti-Aircraft Site on the map. 2. Reach it by road or on foot, not by air. 3. Destroy the cannon with explosives. 4. Repeat until you hit 16.

Tips

A rocket launcher or C4 makes each site quick. Valle De Oro has nine sites, the most of any region, so it is a good place to rack them up. Clearing AA early makes the rest of the map faster to cross.

Related achievements

Image: Ubisoft
Collection
Backpacking
Acquire every Supremo in Yara.

Image: Ubisoft

Official screenshot from Ubisoft.