METEOROLOGY


1. There are many ways of obtaining weather forecasts. Which methods are available when: a) You are on board your boat for a day or two visiting local marinas? b) You are at home planning a two-week holiday on your boat?


2. What is the meaning of the following terms used in the weather forecasts: a) Moderate visibility. c) A backing wind.


b) A fresh breeze or Beaufort Force 5. d) A strong wind warning.


3. Wind strength is just one factor that determines how rough a passage at sea will be. Suggest three others.


4. Being at sea or in rivers and estuaries in fog is very demanding and can be dangerous even with modern electronics. a) Are these common statements about fog true or false? i) When it is foggy it is always calm ii) Fog will always burn off


b) List eight actions to take if the visibility begins to deteriorate while on a passage.


5. On warm summer days when the skies are clear sometimes the wind increases in strength and changes in direction by late morning. Why is this?


6. Which one of the following statements are true? a) The wind blows round a low pressure system: i) clockwise slightly inwards


iii) anti-clockwise slightly inwards


Which one of the following statements are true? b) The wind blows round a high pressure system: i) clockwise slightly inwards


iii) anti-clockwise slightly inwards


ii) clockwise slightly outwards iv) anti-clockwise slightly outwards


ii) clockwise slightly outwards iv) anti-clockwise slightly outwards


7. The following diagram shows the pattern of isobars associated with a high and low pressure system. L A E C H D


a) What is the likely direction of the wind at positions A, B, C, D and E? b) Where is there likely to be isolated squally showers with good visibility? c) Where is there likely to be poor visibility? d) Where is the barometer likely to be falling? e) Where is it likely to be raining? f) What weather conditions would you expect at D and E?


B


18


1016 1020 1024


1008 1012


1000 1004


996


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