Which aircraft control must be maintained if radar information is unserviceable?

Maintaining separation standards is crucial when radar information is unserviceable because it ensures that aircraft do not come too close to each other, which could lead to potential collisions. Separation standards are pre-defined minimum distances or time intervals that must be maintained between aircraft to ensure safety. Without radar, which provides real-time positional information, controllers may rely more on adherence to these standards to manage aircraft movements safely.

In scenarios where radar is unavailable, visual or procedural methods of separation become significant. Pilots and controllers must adhere to established rules regarding how far apart aircraft must be, even if they cannot visually confirm their positions or use electronic aids. This maintains the integrity of air traffic operations, reduces the risk of mid-air collisions, and ensures that each aircraft is operating within its safety limits during the transition to alternative navigation and communication methods.