Weather & Hazardous Conditions Flashcards

What does a red sky in the morning typically warn mariners about?

Answer: Deteriorating weather approaching

The mariners' adage 'red sky in morning, sailor take warning' reflects that red morning skies often indicate moisture-laden air and approaching storm systems.

What hazard do strainers create for paddlers and small boat operators?

Answer: They trap boats and people against objects while water flows through

Strainers are obstacles like fallen trees that allow water to pass through but trap boats and people, creating a life-threatening pinning force.

When operating in coastal waters, a gale warning is issued for sustained winds of:

Answer: 34–47 knots

Gale warnings are issued when sustained winds of 34–47 knots (approximately 39–54 mph) are expected, posing serious danger to small craft.

Which VHF channel should boaters monitor for continuous NOAA weather broadcasts?

Answer: Channel WX1 (162.550 MHz)

NOAA Weather Radio broadcasts on weather channels (WX1–WX7), with WX1 at 162.550 MHz being the most widely used for continuous weather information.

What is a 'waterspout' and why is it dangerous to boaters?

Answer: A rotating column of water-filled air similar to a tornado over water

A waterspout is a rotating funnel of air and water that can capsize small vessels, generate strong winds, and produce dangerous seas.

How should a boater navigate when encountering large ship wakes in open water?

Answer: Head directly into the wake at reduced speed

Heading bow-first into large wakes at a safe, controlled speed prevents the vessel from rolling dangerously beam-to-wave.

What weather phenomenon causes lake and coastal water levels to rise dangerously on the downwind shore during storms?

Answer: Wind setup (seiche)

Wind setup (seiche) occurs when strong sustained winds push surface water toward the downwind shore, causing significant water level rises that can flood docks and marinas.