What type of radar zone focuses on attacking hostile firing systems?

The Call for Fire Zone is specifically designed for adjusting and directing artillery fire against enemy positions, including hostile firing systems. This zone is critical in targeting where the enemy's threats are located, allowing for artillery units to effectively engage and neutralize these threats. It encompasses the area where fire missions can be executed based on observed enemy activity.

In contrast, options like the Critical Friendly Zone focus on protecting friendly forces, while the Censor Zone does not pertain directly to engaging enemy targets. The Artillery Target Intelligence Zone typically deals with gathering and processing information about potential targets rather than executing fire missions against them. Thus, the Call for Fire Zone is particularly relevant for direct engagement with hostile forces, making it the appropriate choice in this context.