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Day-shapes — Seamanship, Mashit 30

21 questions on day-shapes, from the Seamanship exam of Mashit 30. Balls, cones, diamonds and cylinders — what is shown by day. Every question is shown with its correct answer, as in the official question pool.

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Questions on Day-shapes

  1. A vessel shows the lights in picture 39. What will she show by day? The signal shown in picture 81.
  2. What vessel shows the shapes in picture 78? A towing vessel restricted in her ability to manoeuvre.
  3. A vessel shows the lights in picture 53. What will she show by day? No day-shape is needed.
  4. A vessel showing the signal in picture 84 is proceeding about 100 metres off the coast and parallel to it (not a declared bathing beach). What does the law say about her? She is within the law: she is a vessel engaged in fishing.
  5. You are in vessel J under sail only, on port tack. You see B, which is under sail and showing the shape in picture 82. What action is required? I will keep my course and speed.
  6. Vessel K shows the day-shape in picture 86 and sees vessel F, which shows the same day-shape. What action is required? K gives way to F, in accordance with the Collision Regulations.
  7. Vessel J, showing the day-shape in picture 84, sees vessel D showing the flag in picture 98 on her mast and a black ball at the bow. What is vessel D signalling, and what action is required? She is a vessel at anchor with divers down, so you must keep at least 200 metres away from her.
  8. What does a vessel showing the signal in picture 81 indicate? A vessel aground.
  9. A vessel showing the signal in picture 84 is underway about 100 metres from the shoreline of a declared bathing beach. What do the regulations say about her? She is breaking the law. Vessels may not navigate in a declared bathing beach area.
  10. A vessel shows the lights in picture 53. What will she show by day? No day-shape is needed.
  11. What signal will a vessel showing the lights in picture 39 display by day? The signal shown in picture 81.
  12. You are in vessel J under sail only, on port tack. You see B showing the shapes in picture 80. What action is required? J gives way to B in the most effective way.
  13. Vessel J, showing the day-shape in picture 84, sees vessel D showing the flag in picture 98 on her mast and a black ball at the bow. What is vessel D signalling, and what action is required? She is a vessel at anchor with divers down, so you must keep at least 200 metres away from her.
  14. A vessel shows the lights in picture 55. What signal must she show by day? As shown in picture 84.
  15. Sailing vessel O, showing the day-shape in picture 82, sees M showing the day-shape in picture 84 and, in addition, the day-shape in picture 85 on her port side. What action is required? O is power-driven and M is fishing: O must give way and keep clear of the obstruction on the port side of M.
  16. Vessel C, showing the day-shape in picture 84, sees G showing the day-shapes in picture 81. What action is required? C is fishing and G is aground; keep as far away as possible.
  17. Vessel G, showing the signal in picture 82, sees vessel O flying the flag in picture 98 above her superstructure and showing a black ball in the bow. What action is required? Keep at least 200 metres away from O: she is at anchor and engaged in diving operations.
  18. Power-driven vessel K, showing the day-shape in picture 86, sees sailing vessel C on port tack. What action is required? K gives way to C.
  19. Sailing vessel M, showing the day-shape in picture 82, sees rowing boat D, and there is a risk of collision. What action is required? M gives way to D.
  20. Vessel M, showing the day-shape in picture 86, is at risk of collision with K, which is showing the same day-shape. What vessel is this, and what action is required? M is towing and the length of the tow is over 200 metres. M gives way.
  21. A vessel shows the lights in picture 38. What signal will she show by day? As shown in picture 75.

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