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Sound signals — Seamanship, Mashit 30

22 questions on sound signals, from the Seamanship exam of Mashit 30. Manoeuvring signals, fog signals and other blasts. Every question is shown with its correct answer, as in the official question pool.

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Questions on Sound signals

  1. How should a power-driven vessel act when approaching the entrance to Kishon harbour, if from her position it is hard to be sure that no vessels are leaving the harbour? Proceed with alertness and caution, and sound one prolonged blast.
  2. In fog by day you are in a sailing vessel with the engine engaged ahead. You cannot see beyond 50 metres around your vessel. What do you do? I will switch on my navigation lights and sound one prolonged blast every two minutes.
  3. On passage to Cyprus at night, you see a vessel that should give way to you under the Rules of the Road but is not doing so. What do you do? I sound five or more short blasts.
  4. Which of the following contains only distress signals? A red rocket, a continuous blast without a break, slowly raising and lowering the arms at the sides.
  5. Which of the following is not a distress signal? Hoisting a single flag of the International Code of Signals.
  6. Which group contains only distress signs or signals? A square flag with a black ball above it, explosive signals, a continuous blast (without a break), red rockets.
  7. Which picture shows the sound signal a sailing vessel gives in fog? Picture 122.
  8. In fog you hear, ahead of you, the sound signal shown in picture 122 every two minutes, and on your port bow the sound signal shown in picture 120 every 2 minutes. What do these signals mean? A vessel towing another vessel.
  9. You are proceeding in a narrow channel, and near you two ships are proceeding one behind the other. As the Rules require, you are navigating so as not to impede them. You hear the rear ship sound the signal shown in picture 116. What do these blasts mean? I intend to overtake you on your port side.
  10. In restricted visibility at night you hear the sound signal shown in picture 118 every two minutes. What do the blasts mean? I am a power-driven vessel, not making way through the water.
  11. Which picture shows the sound signal a power-driven vessel gives when she intends to overtake another vessel on that vessel's port side? Picture 116.
  12. In good visibility, a vessel on your starboard side sounds at least five short blasts. What does the signal mean? Your intentions are not understood.
  13. In restricted visibility, which of the following vessels sounds one prolonged blast followed by two short blasts, at intervals of two minutes? A vessel engaged in fishing.
  14. You are on vessel G and see vessel K sounding the signal shown in picture 119. What does it mean? The vessel is in distress and needs help.
  15. You are on vessel F and hear vessel H sound three short blasts, three prolonged blasts, three short blasts. What do these blasts mean? This is a vessel signalling that she is in distress.
  16. Vessel F hears vessel H sound a signal of six short blasts, three prolonged blasts, six short blasts. What do these blasts mean? These blasts have no meaning.
  17. In good visibility you hear a vessel on your starboard side sound seven short blasts, with seven short flashes at the same time. What does she mean, and what is she signalling to you? That your intentions are not clear to her, and she is trying to attract your attention.
  18. You are sailing in torrential rain in a 23-metre vessel under sail alone, and can hardly see your own bow. What sound signal will you give? One prolonged blast followed by two short blasts, at intervals of not more than two minutes.
  19. You are sailing in good visibility in a narrow channel and hear two prolonged blasts and one short blast from astern. What does this signal mean? A power-driven vessel intends to overtake you on your starboard side.
  20. G, a power-driven vessel, sees vessel K sounding the signal shown in picture 119. What does it mean? K is in distress and needs help.
  21. Sailing vessel H sees motorboat L sounding the signal in picture 119. What action is required? L is in distress; H must give assistance.
  22. In good visibility, a vessel on your starboard side sounds seven short blasts. They mean: Your intentions are not understood.

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