Navigation lights — Seamanship, Mashit 30

45 questions on navigation lights, from the Seamanship exam of Mashit 30. The navigation lights and special lights vessels show at night. Every question is shown with its correct answer, as in the official question pool.

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Questions on Navigation lights

At night, in a sailing vessel, you see the lights shown in picture 36 dead ahead. What action is required? Keep your course and speed.
What vessel is shown in picture 39? A ship aground.
You see the lights shown in picture 46. What vessel is this? A pilot vessel heading to the left.
Which lights will a vessel 100 metres in length, restricted in her ability to manoeuvre and making way through the water, show? As shown in picture 22.
A vessel shows the lights in picture 61. What do they indicate? The starboard side of a vessel at anchor, more than 50 metres in length.
What vessel shows the lights in picture 28? A vessel engaged in towing, with a length of tow of less than 200 metres.
What vessel shows the lights in picture 8? A fishing vessel.
While underway, you see dead ahead a vessel showing the lights in picture 39. What does she indicate? That she is aground, so I must take care.
A vessel shows the lights in picture 39. What will she show by day? The signal shown in picture 81.
A vessel shows the lights in picture 53. What will she show by day? No day-shape is needed.
You are in a sailing vessel at night. Astern of you, you see a vessel's lights as shown in picture 1, on the same course as yours. With no other information, you know: That there will be a risk of collision only if the range decreases and the compass bearing does not change.
You are in a sailing vessel, motor-sailing. Ahead of you is a vessel showing the flag in picture 98. What lights must she show after dark, and what should you do? Lights as shown in picture 70. She is marking a diving area and you must keep clear of her.
You are in a power-driven vessel. Ahead of you, you see the lights shown in picture 58. What is it, and what do you do? It is a sailing vessel showing her optional all-round lights; I must give way, altering to starboard.
You are in a power-driven vessel and see, on your port side, the lights shown in picture 65. What is the vessel, and what action is required? All of the above.
Sailing vessel O sees vessel C showing the lights in picture 53, and there appears to be a risk of collision. What is the vessel, and what action is required? C is a towing vessel and must give way. Sailing vessel O will hold her course.
You are in vessel H, on a course of 340°, showing the lights in picture 1. You are at risk of collision with P, which shows the lights in picture 58. The wind is easterly. What will you do? I will keep my course and speed.
Vessel K shows the lights in picture 16 and sees vessel C, which shows the lights in picture 28. What action is required? Each alters course to starboard.
Vessel H, showing the lights in picture 36, sees vessel K showing the lights in picture 40. What action is required? K gives way to H because H is on her starboard side.
Vessel P, showing the lights in picture 24, sees vessel C showing the lights in picture 53. What action is required? P is a sailing vessel and C is towing; P keeps her course and speed.
Vessel J, showing the lights in picture 35, sees vessel B showing the lights in picture 15, with flames visible on her deck. What action is required? B is in distress; J must go to her and assist her.
Vessel M shows the lights in picture 1 and is at risk of collision with vessel E, which shows the lights in picture 37. The wind is southerly. Under the Rules, which vessel must give way? M is "overtaking", so the duty to give way is hers.
Vessel J, showing the lights in picture 35, sees vessel B showing the lights in picture 15. What action is required? B gives way to J.
Vessel K shows the lights in picture 16 and sees vessel C, which shows the lights in picture 28 (the wind is easterly, force 4 on the Beaufort scale). What action is required? Each alters course to starboard.
Vessel H, showing the lights in picture 36, sees vessel K showing the lights in picture 40. The wind is northerly, 5 knots. What action is required? K gives way to H because H is on her starboard side.
Vessel P, showing the lights in picture 24, sees vessel C showing the lights in picture 53 (a westerly wind of 15 knots is blowing). What action is required? P is a sailing vessel and C is towing; P keeps her course and speed.
Vessel J, showing the lights in picture 33, sees vessel M showing the lights in picture 67. What action is required? Under the Rules of the Road, both vessels must do everything they can to avoid a collision.
Sailing vessel O sees vessel C showing the lights in picture 53, and there appears to be a risk of collision. What is the vessel, and what action is required? C is a towing vessel and must give way. Sailing vessel O will hold her course.
A vessel shows the lights in picture 53. What will she show by day? No day-shape is needed.
What signal will a vessel showing the lights in picture 39 display by day? The signal shown in picture 81.
M, a sailing vessel, is running with her mainsail on her starboard side. She sees vessel E showing the lights in picture 37, and the lights are growing brighter. Choose the correct answer: M is the overtaking vessel, so the tack does not matter: M gives way.
You are in a sailing vessel and see, right ahead, a vessel showing the lights in picture 39. What is she signalling, and what will you do? She is aground, so I must take care.
You are in vessel H, on a course of 340°, showing the lights in picture 1. You are at risk of collision with P, which shows the lights in picture 58. The wind is westerly. What will you do? I will alter course about 50 degrees to starboard.
Vessel J is on a course of 020°, showing the lights in picture 1. She is at risk of collision with B, which is showing the lights in picture 58. The wind is westerly, and north is at the top of the page. What action is required? J gives way in the most effective way.
A vessel shows the lights in picture 55. What signal must she show by day? As shown in picture 84.
Vessel M, showing the lights in picture 43, sees E showing the same lights, and there is a risk of collision. What action is required? M gives way to E.
Vessel J is on a course of 022°, showing the lights in picture 1. She is at risk of collision with vessel B, which is showing the lights in picture 66. The wind is westerly. What action is required? B keeps her course and speed as far as possible.
Vessel K shows the lights in picture 16 and sees vessel C, which shows the lights in picture 28. What action is required? Each alters course to starboard.
Vessel K, showing the lights in picture 14, sees vessel G showing the lights in picture 55. The wind is northerly. What action is required? K gives way to G.
You are in a sailing vessel and see ahead of you what is shown in picture 39. What should you do? It is a vessel more than 50 metres long, aground; I will keep clear of the danger.
In a northerly wind, you are sailing east under sail and see right ahead a vessel showing the lights in picture 58. What will you do? It is a sailing vessel on starboard tack, so I must give way.
A vessel shows the lights in picture 38. What signal will she show by day? As shown in picture 75.
Vessel K, showing the lights in picture 11, sees vessel O showing the lights in picture 14. What action is required? Under the Rules, O gives way to K.
You are on a vessel leaving Herzliya Marina at night. Which lights do you expect to see on the breakwaters, relative to your bow? Picture 74.
A vessel flies the flag in picture 95 by day. What light will she show at night when in the marina? As shown in picture 13.
At night, in a sailing vessel, you see the lights shown in picture 36 dead ahead. What action is required? I will keep my course and speed.

Navigation lights — Seamanship, Mashit 30

Questions on Navigation lights

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