The brilliance control should be set so that the radar sweep is barely visible.

The brilliance control should be set so that the radar sweep is barely visible.

• A. Visible
• B. Invisible
• C. Bright
• D. Dim

Answer: (A)

Brilliance control sets how bright the radar display appears, including the rotating sweep and echoes. When the sweep is barely visible, you’ve adjusted the level to the threshold where you can just discern the line and the returns without making the screen harsh or washed out. This balance helps you detect echoes clearly while reducing glare and screen clutter during watch. If the sweep were invisible, you wouldn’t see the sweep or targets at all. If it were bright, the screen could be overwhelmed by strong returns and glare, masking weaker targets. If it were dim, even clear echoes might be hard to spot. So the best fit is that the sweep remains visible, just at the edge of detectability.

Brilliance control sets how bright the radar display appears, including the rotating sweep and echoes. When the sweep is barely visible, you’ve adjusted the level to the threshold where you can just discern the line and the returns without making the screen harsh or washed out. This balance helps you detect echoes clearly while reducing glare and screen clutter during watch.

If the sweep were invisible, you wouldn’t see the sweep or targets at all. If it were bright, the screen could be overwhelmed by strong returns and glare, masking weaker targets. If it were dim, even clear echoes might be hard to spot. So the best fit is that the sweep remains visible, just at the edge of detectability.