What type of zone is designed to restrict radar acquisition around friendly systems?

The correct choice is the censor zone. A censor zone is specifically designed to limit or restrict radar and other types of detection to protect friendly forces from being acquired as targets by enemy systems. This concept is particularly important in modern military operations where radar and detection technologies can be employed by adversaries to target friendly units.

Censor zones create a buffer around friendly systems, ensuring that radar signals are not picked up or processed in these areas, thus enhancing the security and operational effectiveness of forces. This is crucial for maintaining the element of surprise and protecting vital assets from reconnaissance efforts by the enemy.

The other types of zones mentioned have different functions and purposes. For instance, a critical friendly zone focuses on protecting critical assets or units but does not specifically encompass the radar acquisition restrictions inherent in a censor zone. The call for fire zone relates to the area used for requesting artillery support, while the artillery target intelligence zone refers to areas in which intelligence gathering occurs for targeting artillery purposes, neither of which directly addresses the need for radar acquisition restrictions around friendly systems.