OTH Boat Crew Practice Test

Anti-exposure coveralls are required in water temperatures within which range?

Between 50 and 60 degrees F Between 0 and 20 degrees F Between 70 and 90 degrees F Between 30 and 40 degrees F

Correct Answer:

Between 50 and 60 degrees F

Explanation:

The key idea is choosing protection based on how quickly heat is lost in the water. Anti-exposure coveralls are designed to slow heat loss when you might be immersed in cool water, specifically in water that's cool enough to threaten hypothermia but not so cold that you’d need a dry or immersion suit. That’s why the required range is between 50 and 60 degrees Fahrenheit—cool enough to warrant insulation, but not freezing cold where heavier protection is needed. In warmer water (70–90 F) the risk of rapid heat loss is much lower, so anti-exposure coveralls aren’t necessary. In very cold water (0–20 F) or still very cold ranges (like 30–40 F), more substantial protection than a coverall would be used.

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