Basic Information
The ESM Tower is used to detect nearby radars. The Tower can detect radars within a 200.0 block range. Furthermore, Search Radars are weaker by nature, so the tower will only be able to identify is one is within its detection range.
Fire Control Radars on the other hand will have their exact locations listed in the gui, if they are active!
NB! An ESM Tower will have its exact position detected by a Search Radar! A detected ESM Tower will cause the radar to emit a redstone signal, just as with a missile. As such, using the ESM Tower does not come without risks. A Missile Silo can be configured to counter-launch if an ESM Tower is picked up by the Search Radar. You can see how this is done on the Search Radar page.
Usage
The tower requires 20 kW of electricity at 480 V.