Hyperwave Relay (EU2012)

The Hyperwave Relay.

The Hyperwave Relay, like the Hyperwave Decoder/Transmission Resolver from previous games, is an intelligence facility that reveals details of enemy craft.

Unlike the advanced detection devices from previous games, it is not a replacement for your previous infrastructure. Keep those satellites running, Commander.

The Relay, once it is constructed, will reveal the mission profile and crew size of a target UFO. It will also show you which alien races are present.

The Hyperwave Relay is also required to locate the invisible Overseer UFO, a task necessary to continue the storyline. It will do so anywhere between a few hours and a few weeks after construction.

Once constructed, it cannot be torn down: as a permanent structure, put it somewhere where it's not going to block any adjaceny bonuses you may want.