Advanced Scanning Capabilities is a technology that can be researched at the War Center in Tech Level 4. It costs 300 Carbon and 300 Nova, and gives all Ships +2 Line of Sight. In addition, all warships can detect enemy stealth units (like the Gungan Frigate). It is available to all civilizations except the Gungans and Republic.
This technology is very important if fighting the Gungans on a water map, as they can otherwise use their invisible Frigates to make hit-and-run attacks on the player. This makes it harder for the Gungan warships to hide.
"All Ships may be equipped with high-end detecting capabilities thanks to this Tech Level 4 upgrade. Submersible units will thus no longer be able to hide."