In a heavy radar target environment, an advisory will appear in the upper PPI raw video feed when 50 percent of maximum target capacity has been reached. If the is message appears, what should the radar operator accomplish?

• A. Memory Purge
• B. Increase range scale
• C. Change to higher resolution
• D. Ignore the alert

Answer: (A)

In a heavy radar target environment, the test is about managing memory usage and keeping the system from becoming overwhelmed. When the advisory shows that target capacity has reached 50%, the operator should perform a memory purge. This action frees up memory by removing older or less important target data from the track memory, making room for new detections and preventing memory overflow which could cause loss of tracking performance. Increasing range scale or going to higher resolution would typically increase memory demands, not relieve them, and ignoring the alert could lead to dropped targets. Memory purge directly addresses the memory constraint and keeps the radar functioning effectively in a high-load situation.