The Radar Dome is a building. If the player has one or more radar domes, the minimap is unlocked. Loosely speaking, the Radar Dome is a requirement for "range or technology oriented" units, whilst the Service Depot is a requirement for "Heavy or mechanically oriented" units. The radar dome is a requirement for the following buildings: * Helipad (Allies) and Airfield (Soviets) * Tech Center The radar dome is a requirement for the following defenses: * AA Gun (Allies) and Sam Site (Soviets) The radar dome is a requirement for the following infantry: * Spy