What happens when the radar brilliance control is set too high?

When the radar brilliance control is set too high, it results in the washing out of details on the radar display. This phenomenon occurs because excessive brilliance amplifies the brightness of all returns on the screen, which can obscure important information such as the outlines and characteristics of nearby vessels or land masses. Consequently, critical details may become difficult to distinguish, making navigation and situational awareness more challenging. It is important for operators to adjust the brilliance control to an optimal level to ensure clear visibility while maintaining essential details crucial for effective operation and safety.