What do radar towers/outposts/airfields do?
These three terrain buildings were added in Play the World, and they each can be created by a worker in neutral or your territory by clicking their respective button. If you use a worker to build one of them, the worker will ‘get killed during construction’ (e.g. he disappears from the game), and then you will now have your building. They are created instantly, and do not require any maintenance or anything. Radar towers provide a 25% boost to your units that attack and defend within 2 tiles of a radar tower. Outposts provide line of sight and eliminate fog of war from surrounding tiles (their range is 2 for flat land, 3 for hills, 4 for mountains). An airfield allows planes to rebase there and conduct missions as well as letting paratroopers do an air drop without having to build a city with an airport on that tile.
