Sector Defence Sensors

Copy and pasted from the SD topic:

SD sensors are more important than cloak, and you'll usually upgrade this higher than fighters as well. Higher sensors make it less likely anyone will be able to cloak into your sector. Also, when a person ARs (attack and run) your sector, this will increase the likeyhood your SD does damage to the ship. Finally, when someone attacks your sector head on, this will increase the effectiveness of your fighters.

And remember, only the highest sensor tech does anything. Don't upgrade this on multiple planets.

---