OBS Weather & Hazardous Conditions 2

Question 1

Which cloud formation is most commonly associated with sudden, violent thunderstorms on the water?

Accepted Answer

Cumulonimbus

Answer

Cumulonimbus clouds are tall, anvil-shaped storm clouds that produce lightning, heavy rain, and strong gusty winds.

Question 2

What does a rapidly falling barometer reading indicate for boaters?

Accepted Answer

Approaching storm or bad weather

Answer

A rapidly falling barometer means atmospheric pressure is dropping, which signals an approaching storm or deteriorating weather conditions.

Question 3

When caught in a thunderstorm on a small open boat, what is the safest position for passengers?

Accepted Answer

Sit low in the boat away from metal objects

Answer

Sitting low in the boat and away from metal objects reduces the risk of lightning strike and keeps the center of gravity low in rough water.

Question 4

What wind speed (in knots) typically signals small craft advisory conditions?

Accepted Answer

21–33 knots

Answer

Small craft advisories are issued when sustained winds of 21–33 knots or hazardous wave conditions are expected.

Question 5

If you see lightning strike the water nearby while boating, what is the immediate risk besides fire?

Accepted Answer

Electric shock through the water

Answer

Lightning can travel through water and electrocute anyone in or near the water, making it extremely dangerous to be overboard during a storm.

(OBS) Online Boating Safety Certification Practice Test