RYA Day Skipper Weather and Meteorology — Questions and Answers
Question 1: In the UK Shipping Forecast, what does 'veering' mean when describing wind direction?
- Wind decreasing in strength
- Wind direction changing clockwise (e.g., from south to west) (Correct answer)
- Wind direction changing anticlockwise
- Wind gusting
Correct answer: Wind direction changing clockwise (e.g., from south to west)
Veering describes a clockwise change in wind direction (e.g., from south to southwest to west). The opposite, a change anticlockwise, is called 'backing'.
Question 2: What is the Beaufort Scale used to measure?
- Sea temperature
- Wind force, ranging from Force 0 (calm) to Force 12 (hurricane) (Correct answer)
- Atmospheric pressure
- Visibility
Correct answer: Wind force, ranging from Force 0 (calm) to Force 12 (hurricane)
The Beaufort Scale classifies wind speed into forces from 0 (calm, less than 1 knot) to 12 (hurricane force, 64+ knots), with descriptions of sea state at each level.
Question 3: What weather conditions are typically associated with an approaching warm front?
- Clear skies and light winds
- Gradually lowering cloud, increasing rain, backing and increasing winds, and falling barometric pressure (Correct answer)
- Sudden thunderstorms
- Fog and calm conditions
Correct answer: Gradually lowering cloud, increasing rain, backing and increasing winds, and falling barometric pressure
An approaching warm front typically brings gradually lowering and thickening cloud (cirrus, then altostratus, then nimbostratus), steady rain, falling pressure, and backing winds.
Question 4: What does a rapidly falling barometer indicate to a sailor?
- Settled weather ahead
- Deteriorating weather conditions with strong winds likely (Correct answer)
- Rising temperatures
- Fog is likely
Correct answer: Deteriorating weather conditions with strong winds likely
A rapidly falling barometer indicates that a deep low-pressure system is approaching, bringing strong winds, rain, and potentially dangerous conditions. A fall of more than 10 mb in 3 hours is significant.
Question 5: In the UK Shipping Forecast, what visibility range does 'poor' indicate?
- Less than 1,000 metres
- 1,000 metres to 2 nautical miles (Correct answer)
- 2 to 5 nautical miles
- Greater than 5 nautical miles
Correct answer: 1,000 metres to 2 nautical miles
In the Shipping Forecast, 'poor' visibility means between 1,000 metres and 2 nautical miles. 'Fog' is less than 1,000m, 'moderate' is 2-5nm, and 'good' is greater than 5nm.
Question 6: What is a 'sea breeze' and when does it typically occur?
- A strong offshore wind at night
- A daytime onshore wind caused by differential heating between land and sea (Correct answer)
- A constant offshore wind
- A wind caused by tidal streams
Correct answer: A daytime onshore wind caused by differential heating between land and sea
A sea breeze develops during the day when the land heats faster than the sea. Warm air rises over the land, and cooler air from the sea flows in to replace it, creating an onshore breeze.
RYA Day Skipper Weather and Meteorology
In the UK Shipping Forecast, what does 'veering' mean when describing wind direction?