Threats
Radars are vulnerable and high value targets; they are easy to detect and locate if the enemy has the necessary ELINT/ESM capability. The consequences of this detection are likely to be attack by artillery fire or aircraft (including anti-radiation missiles) or ECM. The usual measures against detection are using a radar horizon to screen from ground based detection, minimising transmission time and using alerting arrangements to tell the radar when hostile artillery is active. Deploying radars singly and moving frequently reduces exposure to attack.
However, in low threat environments, such as the Balkans in the 1990s, they may transit continuously and deploy in clusters to provide all-around surveillance.
In other circumstances, particularly counter-insurgency, where ground attack with direct fire or short range indirect fire is the main threat radars deploy in defended localities but do not need to move, unless they need to cover a different area.
Read more about this topic: Counter-battery Radar
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