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Synoptic charts — Seamanship, Mashit 30

23 questions on synoptic charts, from the Seamanship exam of Mashit 30. Reading the chart: wind direction, lows, fronts and isobars. Every question is shown with its correct answer, as in the official question pool.

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Questions on Synoptic charts

  1. Which statement about the synoptic chart shown is correct? Picture 2 is before the cold front passes: the sea is high and the wind is a strong south-westerly.
  2. With reference to the attached chart, what will the wind direction be where isobar 1004 meets the island of Cyprus? South-easterly.
  3. With reference to the attached chart, and taking the depression as stationary for this question, what will the barometric pressure trend be when sailing from A to B? The barometric pressure is steady.
  4. With reference to the attached chart, what will the wind direction be at point C? The wind at this point will be northerly to north-easterly.
  5. With reference to the attached chart, what will the wind direction be in the Bosphorus strait (in Turkey), ignoring the effect of the topography? Westerly.
  6. The diagram shows a horizontal section (plan view) of a frontal depression in the northern hemisphere. You are sailing from B to A. What will the atmospheric pressure trend be while you cross the warm air mass (the warm sector)? Steady pressure.
  7. As the vessel crosses the warm front from point B to point A, how will the wind direction change? From southerly to south-westerly.
  8. Sailing from the cold front towards point A, how will the visibility change? Visibility steadily improves.
  9. According to the attached diagram, choose the correct statement: This is a sharav (hot, dry) low typical of spring; winds at Eilat will be southerly, about 15 knots, and visibility along Israel's Mediterranean coast will be poor.
  10. According to the diagram (northern hemisphere), choose the correct answer: At point A the wind will be north-westerly and the estimated pressure 1010.
  11. Choose the most correct answer about the diagram: This is a sharav (hot, dry) low that ends in a violent break (in spring).
  12. According to the diagram, what will the wind direction be over Crete? Northerly.
  13. According to the diagram, what will the wind direction be at Eilat? South-westerly.
  14. According to the diagram, where are the strongest winds expected? Between Cyprus and the coast of Israel.
  15. What will the wind direction be in the south of Israel, along the coastal plain? A south-westerly wind.
  16. On the attached synoptic chart, where are cumulonimbus clouds expected to develop? At point L.
  17. From the synoptic chart below (north is at the top of the page), sailing from A to B and assuming the front is not moving, what is the wind direction on your track before you cross the warm front? South-westerly.
  18. From the synoptic chart, what clouds, if any, will there be at point O? Cumulonimbus clouds.
  19. From the synoptic chart, where is visibility expected to be best? At point A.
  20. On the attached synoptic chart, what is the wind direction at point B? None of the above.
  21. On the attached synoptic chart, choose the most correct statement about visibility: Visibility at point A is very restricted.
  22. Using the attached synoptic chart: you are sailing from Cyprus to Israel on a course of 150°. On what point of sail and tack is the yacht for most of the passage? Beam reach, port tack.
  23. According to the attached chart, what will affect the island of Cyprus? The cold sector of the winter low.

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