PCOC Weather and Environmental Factors 5

Question 1

What weather phenomenon is most responsible for creating 'sneaker waves' that can sweep people off rocks or beaches?

Accepted Answer

Distant storm swells that interact with shallow bottom topography

Answer

Sneaker waves are caused by long-period swells generated by distant storms that can suddenly surge much higher than surrounding waves.

Question 2

What is the recommended action when lightning is observed and thunder is heard within 30 seconds of the flash?

Accepted Answer

Seek shelter immediately — you are within the danger zone

Answer

The 30-second rule (lightning-to-thunder gap of 30 seconds = approximately 6 miles) means the storm is dangerously close and shelter should be sought immediately.

Question 3

Which condition is most likely to cause 'white squall' — a sudden, violent windstorm with no visible clouds?

Accepted Answer

Sudden localized downdrafts associated with invisible convective activity

Answer

White squalls occur when powerful downdrafts descend from convective clouds that may not be visible, hitting the water surface and creating sudden, extreme winds.

Question 4

How does saltwater spray affect a boater's ability to navigate in cold weather?

Accepted Answer

Salt spray can freeze on surfaces, adding weight and reducing visibility through windows

Answer

In cold temperatures, saltwater spray can freeze on decks, windshields, and equipment, creating icy conditions and dangerous weight accumulation.

Question 5

What does 'sea state' refer to in marine weather reports?

Accepted Answer

The general condition of the sea surface, including wave height and character

Answer

Sea state describes the overall wave conditions including height, period, and character, which directly affects vessel safety and comfort.

(PCOC) Pleasure Craft Operator Card Practice Test

(PCOC) Pleasure Craft Operator Card Practice Test

PCOC Weather and Environmental Factors 5