On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. The red sector __________.

Correct Answer: Option C — indicates a danger area

Red sectors in navigation lights are specifically designed to warn mariners of nearby dangers, such as shoals, wrecks, or rocks. When a vessel enters a red sector, the navigator must immediately check their position and adjust course to return to the safe white sector of the light.