How many FCRs would be needed for two groups in azimuth, 10 NM apart, each with two contacts?

The question pertains to the number of Fire Control Radars (FCRs) required to monitor two groups of targets that are 10 nautical miles apart, with each group containing two contacts.

In this scenario, each FCR can typically cover a certain azimuth range, which allows it to detect and track multiple targets within that area. For two groups of targets to be effectively monitored, one FCR would not be sufficient, primarily due to the distance between the groups and the limitation of tracking multiple contacts simultaneously from a single radar source. If the groups are positioned 10 NM apart, a single FCR may not be able to provide adequate coverage over both groups without sacrificing target resolution or tracking accuracy.

Deploying two FCRs would allow each radar to focus on one group of contacts, ensuring that the two groups are adequately tracked and engaged if necessary. This allocation optimizes radar performance and maintains the ability to effectively handle multiple contacts or threats in separate locations.

Using two FCRs provides the necessary separation to avoid potential tracking issues and maximizes the radar systems' capabilities per group of contacts. Therefore, the appropriate solution is to have two FCRs, each dedicated to monitoring one of the target groups.