The Radar Dome is a building. If the player has one or more radar domes, the minimap is unlocked. It also has the longest Line of Sight in the game.
When powered down, the Radar Dome loses its functionality temporarily, and if the player had a functioning GPS satellite, then it won't work for as long as the Radar Dome is powered down.
Prerequisites[]
Loosely speaking, the Radar Dome is a prerequisite for "range or technology oriented" units, whilst the Service Depot is a prerequisite for "heavy or mechanically oriented" units.
The radar dome is a prerequisite for following: