Weather & Hazardous Conditions Flashcards
7 cards from real OBS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Weather & Hazardous Conditions flashcards as text
What is the term for a sudden, localized storm with high winds and heavy rain that can develop with little warning on inland lakes?
Answer: Squall
Squalls are brief, intense storms characterized by sudden strong winds, rain, and lightning that can rapidly appear over lakes and coastal waters.
How does alcohol consumption affect a boater's ability to cope with cold water immersion?
Answer: It causes blood vessels to dilate, accelerating heat loss and hypothermia
Alcohol causes vasodilation, drawing warm blood to the skin where it rapidly loses heat to cold water, dramatically speeding up hypothermia.
What weather sign should immediately prompt a boater to head for shore even if the sky looks partly clear?
Answer: Distant anvil-shaped clouds building on the horizon
Anvil-shaped (cumulonimbus) clouds building on the horizon indicate a developing thunderstorm that can reach a boat's position faster than expected.
What does a 'hurricane watch' mean for boaters, as compared to a 'hurricane warning'?
Answer: A watch means conditions are possible within 48 hours; a warning means they are expected within 36 hours
A hurricane watch means hurricane conditions are possible within 48 hours, while a hurricane warning means they are expected within 36 hours — both require immediate action.
Which situation is most likely to cause carbon monoxide (CO) poisoning linked to weather conditions on a boat?
Answer: Operating in calm, enclosed areas with little airflow such as during anchoring in a cove
Calm conditions with little wind allow CO from the engine exhaust to accumulate around swim platforms and cockpits, especially when anchored or idling.
What is a 'riptide' (rip current), and what is the correct way to escape one?
Answer: A narrow channel of water flowing rapidly offshore; swim parallel to shore to exit it
Rip currents are powerful, narrow offshore flows; swimming parallel to shore moves you out of the current's narrow channel so you can then swim back to shore.
What is the safest anchoring strategy if an unexpected storm forces a boater to stay on the water overnight?
Answer: Anchor in a sheltered cove with adequate scope, away from lee shores and obstacles
A sheltered cove reduces wave and wind exposure, and adequate anchor scope (7:1 chain-to-depth ratio) ensures the anchor holds through storm conditions.