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

Local afternoon thunderstorms

Answer

Sudden offshore wind gusts

Answer

Rapid tidal changes near river mouths

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

Continue if lightning is moving away from your position

Answer

Reduce speed but continue to your destination

Answer

Only take shelter if the storm is directly overhead

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

A passing cold front with heavy precipitation

Answer

Clear-air turbulence descending from jet streams

Answer

A tidal bore accelerating into a narrow channel

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

It has no effect on navigation ability

Answer

Saltwater spray improves traction on deck surfaces

Answer

It dilutes fuel if the engine is exposed, causing stalling

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

The temperature and salinity measurements of surface water

Answer

The tidal stage at a specific location at a specific time

Answer

The density and direction of maritime shipping traffic

Question 6

What should a boater do when they observe rapidly building cumulus clouds with flat, dark bases during a summer afternoon?

Accepted Answer

Head to shore immediately — these are signs of developing thunderstorms

Answer

Continue boating since afternoon clouds are normal and rarely produce storms

Answer

Anchor and wait for the clouds to pass before resuming travel

Answer

Only respond if official weather warnings have been issued

Question 7

What is the purpose of a marine weather buoy report (e.g., NOAA buoy data)?

Accepted Answer

To provide real-time observed wind, wave, and temperature data from fixed ocean locations

Answer

To track commercial shipping vessel positions

Answer

To broadcast international distress calls from vessels in trouble

Answer

To transmit GPS correction signals for navigation accuracy