Cloaking is a type of counter-intelligence that makes a unit invisible to line of sight. Cloaked units will be detected by radar but can only be revealed by omni-sensors.
Units with Cloaking[]
There are four units with cloaking:
Cybran Armored Command Unit
Cybran T3 Support Armored Command Unit
Cybran T1 Land Scout: Mole
Seraphim T1 Combat Scout: Selen
To see more info about this topic, check out the Intel page.