Dye/sea markers release dye into water and must be used only during the ___.

Dye/sea markers release dye into water and must be used only during the ___.

• A. Day
• B. Night
• C. Dusk
• D. Dawn

Answer: (A)

The key idea is that dye markers for water are a visual signal whose effectiveness depends on daylight. Releasing the dye during the day ensures it is easily visible to search-and-rescue teams, aircraft, and other vessels, making it possible to locate and track the marker quickly and accurately. In daylight the contrast between the dye and the water is high, and drift patterns can be observed clearly. At night or in low light (dusk/dawn), visibility is poor, which can delay rescue or lead to misinterpretation of the marker. That's why they’re used only during the day.

The key idea is that dye markers for water are a visual signal whose effectiveness depends on daylight. Releasing the dye during the day ensures it is easily visible to search-and-rescue teams, aircraft, and other vessels, making it possible to locate and track the marker quickly and accurately. In daylight the contrast between the dye and the water is high, and drift patterns can be observed clearly. At night or in low light (dusk/dawn), visibility is poor, which can delay rescue or lead to misinterpretation of the marker. That's why they’re used only during the day.