Deck Officers require a comprehensive knowledge of The International Regulations for Preventing Collisions at Sea (COLREGS). You must be able to correctly assess any situation you come across and determine the correct course of action to take in compliance with the COLREGS. You will be thoroughly examined on this area when sitting your MCA Oral exam at all levels.
The Quiz below replicates the style of question you can expect to encounter at your oral examination. For all questions you are the watchkeeping officer on a Power Driven Vessel which is 150m in length. Take you’re time to thoroughly assess each situation before you formulate an answer. After each question you will be provided with a textbook answer. Remember that in the real MCA oral exam failure to give the correct answer will instantly result in an overall fail. Good Luck!
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Question 1 of 56
1. Question
You see this vessel crossing from left to right, 4 points on your port bow. You have taken a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
The vessel is a sailing vessel being propelled by machinery as it is displaying the day shape – a cone apex downward where best seen.
Sound Signal in Restricted Visibility
In restricted visibility its sound signal is that of a power driven vessel. When making way through the water one prolonged blast on the ships whistle at intervals not exceeding 2 minutes. When stopped and not making way through the water two prolonged blast on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should treat it as a power driven vessel and stand on with caution under Rule 15 Crossing Situation.
Incorrect
-
Question 2 of 56
2. Question
You see this vessel crossing from right to left, 4 points on your starboard bow. You have taken a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, any action to be taken, its sound signal in restricted visibility, and the relevant COLREG rule that applies to the situation.
Correct
Vessel
The vessel is a sailing vessel being propelled by machinery as it is displaying the day shape – a cone apex downward where best seen.
Sound Signal in Restricted Visibility
In restricted visibility its sound signal is that of a power driven vessel. When making way through the water one prolonged blast on the ships whistle at intervals not exceeding 2 minutes. When stopped and not making way through the water two prolonged blast on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should treat it as a power driven vessel and keep out of its way. If the circumstances of the case admit you should avoid crossing ahead of the vessel. The correct course of action is to alter course to starboard and pass clear around her stern. Rule 15 – Crossing situation.
Incorrect
-
Question 3 of 56
3. Question
During the 0200-0400 watch you observe the following lights 3 points on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a fishing vessel engaged in trawling, making way, viewed from the port side. The length of the vessel is less than 50m and it is fishing in close proximity to other vessels. The additional two all round white lights (positioned where best can be seen) indicate she is shooting nets.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of the vessel under Rule 18 – Responsibilities between vessels.
Incorrect
-
Question 4 of 56
4. Question
During the 0400-0800 watch you observe the following lights 5 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
Power driven vessel probably over 50m in length engaged in towing another vessel. The length of the two exceeds 200m and she is restricted in her ability to manoeuvre.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of this vessel as per Rule 18 – Responsibilities between vessels. The best course of action would be to conduct a bold alteration of course to port and pass clear around her stern.
Incorrect
-
Question 5 of 56
5. Question
During the 2000-0000 watch you look out of the window and observe the following lights dead ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a sailing vessel less than 20m in length viewed from ahead.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You must keep clear of the vessel under rule 18 – responsibilities between vessels.
Incorrect
-
Question 6 of 56
6. Question
During the 0200-0400 watch you look out of the window and observe the following lights 4 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
It is a vessel engaged in Pilotage Duty.
Sound Signal in Restricted Visibility
When making way through the water one prolonged blast on the ships whistle at intervals not exceeding 2 minutes. When stopped and not making way through the water two prolonged blast on the ships whistle at intervals not exceeding 2 minutes. In addition when engaged on pilotage duty it may also sound an identity signal of four short blasts.
Action/Rule
Stand on with caution – Rule 15 Crossing Situation.
Incorrect
-
Question 7 of 56
7. Question
During the 0200-0400 watch you look out of the window and observe the following lights 1 point on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a sailing vessel displaying the additional masthead lights allowed under rule 25c (Sailing Vessels Underway and Vessels Under Oars).
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of the vessel under Rule 18 – Responsibilities between vessels.
Incorrect
-
Question 8 of 56
8. Question
During the 0800-1200 watch you observe the following vessel crossing from left to right 6 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel is restricted in her ability to manoeuver.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of her as required by Rule 18 – Responsibilities Between Vessels. The best course of action is a readily apparent alteration of course to port to pass clear around her stern.
Incorrect
-
Question 9 of 56
9. Question
During the 0800-1200 watch you observe the following vessel crossing from right to left 3 points on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
The vessel is restricted in her ability to manoeuver.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of her as required by Rule 18 – Responsibilities Between Vessels. The best course of action is a readily apparent alteration of course to starboard to pass clear around her stern.
Incorrect
-
Question 10 of 56
10. Question
During the 0000-0400 watch you observe the following vessel crossing from left to right 5 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a power driven vessel less than 50m in length engaged in a towing operation, the length of tow is less than 200m.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes. If the vessel towed or if more than one vessel is towed the last vessel of the tow, if manned, shall at intervals not exceeding 2 minutes sound four blasts in succession namely one prolonged blast followed by three short blasts. When practicable this shall be made immediately after the signal made by the towing vessel.
Action/Rule
You should stand on with caution – Rule 15 Crossing Situation.
Incorrect
-
Question 11 of 56
11. Question
During the 0400-0800 watch you observe the following lights dead ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a fishing vessel engaged in trawling, making way viewed from ahead. The length of the vessel is probably over 50m.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of the vessel under Rule 18 – Responsibilities between vessels.
Incorrect
-
Question 12 of 56
12. Question
During the 0000-0400 watch you and observe the following lights 5 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
Power driven vessel less than 50m in length engaged in towing another vessel. The length of the two exceeds 200m.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes. If the vessel towed or if more than one vessel is towed the last vessel of the tow, if manned, shall at intervals not exceeding 2 minutes sound four blasts in succession namely one prolonged blast followed by three short blasts. When practicable this shall be made immediately after the signal made by the towing vessel.
Action/Rule
You should stand on with caution Rule 15 – Crossing Situation.
Incorrect
-
Question 13 of 56
13. Question
During the 0400-0800 watch you and observe the following vessel 5 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing however the vessel is not taking any action to avoid collision as required by Rule 15. Identify the vessel, its sound signal in restricted visibility and your actions.
Correct
Vessel
Power driven vessel less than 50m in length engaged in towing another vessel. The length of the two exceeds 200m.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes. If the vessel towed or if more than one vessel is towed the last vessel of the tow, if manned, shall at intervals not exceeding 2 minutes sound four blasts in succession namely one prolonged blast followed by three short blasts. When practicable this shall be made immediately after the signal made by the towing vessel.
Action/Rule
- Immediately sound 5 or more short and rapid blasts your ships whistle. This may be supplemented by a light signal of at least 5 short and rapid flashes.
- Inform the Master.
- Ensure that you are in hand steering.
- Consider reducing speed.
- If necessary take action by your manoeuver alone but you shall if the circumstances of the case admit not alter course to port for a PDV on your own port side.
Incorrect
-
Question 14 of 56
14. Question
During the 1200-1600 watch you observe the following vessel 3 points on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a fishing vessel it may be trawling or fishing other than trawling.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of the vessel under Rule 18 – Responsibilities between vessels.
Incorrect
-
Question 15 of 56
15. Question
During the 0400-0800 watch you observe the following lights 5 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel engaged in fishing other than trawling, making way, with outlying gear extending more than 150m horizontally from the vessel.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of the vessel – Rule 18 Responsibilities Between Vessels.
Incorrect
-
Question 16 of 56
16. Question
During the 2000-0000 watch you observe the following lights 2 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel engaged in trawling probably over 50m in length, making way.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of the vessel. Rule 18 – Responsibilities Between Vessels.
Incorrect
-
Question 17 of 56
17. Question
During the 2000-0000 watch you observe the following lights 4 points on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel engaged in trawling making way.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of the vessel. Rule 18 – Responsibilities between vessels.
Incorrect
-
Question 18 of 56
18. Question
During the 1200-1600 watch you observe the following vessel ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel at anchor.
Sound Signal in Restricted Visibility
Rapid ringing of the ships bell for 5 seconds at intervals not exceeding 1 minute. If the vessel is 100m or more in length the bell must be sounded in the fore part of the vessel and immediately after the gong shall be sounded rapidly for 5 seconds.
Action/Rule
There is no specific rule that applies for collision avoidance with vessels at anchor. Good seamanship dictates that you should pass astern of the vessel.
Incorrect
-
Question 19 of 56
19. Question
During the 1200-1600 watch you observe the following vessel ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel engaged in dredging or underwater operations restricted in her ability to manoeuver. She has an obstruction on her starboard side and it is clear to pass on her port side.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of her and pass down her port side. Rule 18 – Responsibilities between vessels.
Incorrect
-
Question 20 of 56
20. Question
During the 1600-2000 watch you observe the following vessel ahead. The flag it is displaying appears to be a rigid replica and is greater than 1m in height. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel restricted in her ability to manoeuvre engaged in diving operations. As per Rule 27e she is displaying a rigid replica International Code “A” as her size makes it impracticable to exhibit all the lights and shapes normally displayed by this type of vessel.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of her. Rule 18 – Responsibilities between vessels.
Incorrect
-
Question 21 of 56
21. Question
During the 0800-1200 watch you observe the following vessel 7 points on your port bow crossing left to right. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel not under command.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of her. Rule 18 – Responsibilities between vessels.
Incorrect
-
Question 22 of 56
22. Question
During the 0400-0800 watch you observe the following lights 1 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a fishing vessel engaged in trawling, making way, viewed from the starboard side. The length of the vessel is less than 50m and it is fishing in close proximity to other vessels. The additional two all round lights white over red (positioned where best can be seen) indicate she is hauling nets.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of the vessel under Rule 18 – Responsibilities between vessels.
Incorrect
-
Question 23 of 56
23. Question
During the 1200-1600 watch you observe the following vessel dead ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel aground.
Sound Signal in Restricted Visibility
Three separate and distinct strokes on the ships bell, followed by rapid ringing of the ships bell for 5 seconds, followed by another 3 separate and distinct strokes on the ships bell, at intervals not exceeding 1 minute. If the vessel is 100m or more in length the bell must be sounded in the fore part of the vessel and immediately after the gong shall be sounded rapidly for 5 seconds.
Action/Rule
There is no specific COLREG rule that applies to this situation. The actions you should take include:
- Immediately stop your vessel and conduct a navigation risk assessment (this includes fixing your vessels position and checking the chart data/depths)
- Inform the Master of the situation.
- Attempt to contact the other vessel and establish the circumstances of her grounding and her particulars at that time (especially her draught).
Incorrect
-
Question 24 of 56
24. Question
During the 0400-0800 watch observe the following lights 6 points on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a power driven vessel probably more than 50m in length
Sound Signal in Restricted Visibility
When making way through the water one prolonged blast on the ships whistle at intervals not exceeding 2 minutes. When stopped and not making way through the water two prolonged blast on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
Keep out of the way. If the circumstances of the case admit you should avoid crossing ahead of the vessel. The correct course of action is to alter course to starboard and pass clear around her stern. Rule 15 – Crossing situation.
Incorrect
-
Question 25 of 56
25. Question
During the 0000-0400 watch observe the following lights 5 points on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel not under command, making way.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of her. Rule 18 – Responsibilities between vessels.
Incorrect
-
Question 26 of 56
26. Question
During the 0000-0400 watch you observe the following lights 3 points on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
Power driven vessel probably over 50m in length engaged in towing another vessel. The length of the tow is less than 200m.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes. If the vessel towed or if more than one vessel is towed the last vessel of the tow, if manned, shall at intervals not exceeding 2 minutes sound four blasts in succession namely one prolonged blast followed by three short blasts. When practicable this shall be made immediately after the signal made by the towing vessel.
Action/Rule
Keep out of the way. If the circumstances of the case admit you should avoid crossing ahead of the vessel. The best course of action is to alter course to starboard and pass clear around her stern. Rule 15 – Crossing situation.
Incorrect
-
Question 27 of 56
27. Question
During the 0400-0800 watch observe the following lights 6 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel restricted in her ability to manoeuver engaged in a mine clearance operation.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of her as required by Rule 18 – Responsibilities Between Vessels. Additionally it is dangerous to approach within 1000m of this vessel.
Incorrect
-
Question 28 of 56
28. Question
During the 1600-2000 watch you observe the following vessel crossing from left to right 3 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a power driven vessel constrained by her draught.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should avoid impeding her safe navigation as required by Rule 18 – Responsibilities Between Vessels. If the distances are sufficient you could reduce speed and allow her to pass ahead of you clear. Alternatively you can alter to starboard, parallel her course and conduct a box turn (round turns should be avoided). Never alter course to port for a vessel constrained by her draught on your own port side.
Incorrect
-
Question 29 of 56
29. Question
During the 0400-0800 watch you and observe the following lights 2 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
Power driven vessel probably over 50m in length pushing ahead another vessel.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep out of the way and shall if the circumstances of the case admit avoid crossing ahead of the other vessel. Rule 15 Crossing Situation. Best course of action alter course to starboard and pass clear around the vessels stern.
Incorrect
-
Question 30 of 56
30. Question
During the 0400-0800 watch you and observe the following lights 2 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
Power driven vessel less than 50m in length pushing ahead another vessel.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep out of the way and shall if the circumstances of the case admit avoid crossing ahead of the other vessel. Rule 15 Crossing Situation. Best course of action alter course to starboard and pass clear around the vessels stern.
Incorrect
-
Question 31 of 56
31. Question
During the 0800-0000 watch observe the following lights dead ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a power driven vessel less than 50m in length restricted in her ability to manoeuver engaged in a mine clearance operation.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of her as required by Rule 18 – Responsibilities Between Vessels. Additionally it is dangerous to approach within 1000m of this vessel.
Incorrect
-
Question 32 of 56
32. Question
During the 0400-0800 watch observe the following lights dead ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a purse seine fishing vessel hampered by her gear, making way.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of her as required by Rule 18 – Responsibilities Between Vessels.
Incorrect
-
Question 33 of 56
33. Question
During the 2000-0000 watch you observe the following vessel dead ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel aground over 50m in length.
Sound Signal in Restricted Visibility
Three separate and distinct strokes on the ships bell, followed by rapid ringing of the ships bell for 5 seconds, followed by another 3 separate and distinct strokes on the ships bell, at intervals not exceeding 1 minute. If the vessel is 100m or more in length the bell must be sounded in the fore part of the vessel and immediately after the gong shall be sounded rapidly for 5 seconds.
Action/Rule
There is no specific COLREG rule that applies to this situation. The actions you should take include:
- Immediately stop your vessel and conduct a navigation risk assessment (this includes fixing your vessels position and checking the chart data/depths)
- Inform the Master of the situation.
- Attempt to contact the other vessel and establish the circumstances of her grounding and her particulars at that time (especially her draught).
Incorrect
-
Question 34 of 56
34. Question
During the 0400-0800 watch you observe the following lights 3 points on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
Power driven vessel less than 50m in length engaged in towing a partly submerged object less than 25m in breadth and less than 100m in length.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
Keep out of the way. If the circumstances of the case admit you should avoid crossing ahead of the vessel. The best course of action is to alter course to starboard and pass clear around her stern. Rule 15 – Crossing situation.
Incorrect
-
Question 35 of 56
35. Question
You see this vessel crossing from left to right, 2 points on your port bow. You have taken a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is an air-cushion vessel probably greater than 50m in length viewed from the starboard side. It is operating in non-displacement mode.
Sound Signal in Restricted Visibility
When making way through the water one prolonged blast on the ships whistle at intervals not exceeding 2 minutes. When stopped and not making way through the water two prolonged blast on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
Stand on with caution under Rule 15 Crossing Situation.
Incorrect
-
Question 36 of 56
36. Question
During the 0400-0800 watch you observe the following lights dead ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a fishing vessel engaged in trawling, not making way. The length of the vessel is less than 50m and it is fishing in close proximity to other vessels. The additional two all round red lights (positioned where best can be seen) indicate her nets are fast upon and obstruction.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of the vessel under Rule 18 – Responsibilities between vessels.
Incorrect
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Question 37 of 56
37. Question
During the 1200-0400 watch you observe the following vessel 5 points on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a power driven vessel probably over 50m in length constrained by her draught.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should avoid impeding her safe navigation as required by Rule 18 – Responsibilities Between Vessels. Therefore you should alter course to starboard and pass clear around her stern.
Incorrect
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Question 38 of 56
38. Question
During the 2000-1200 watch you observe the following 3 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel engaged in towing another vessel viewed from astern.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You are overtaking this vessel therefore you shall keep out of her way until you are finally past and clear. Rule 13 – Overtaking.
Incorrect
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Question 39 of 56
39. Question
During the 1600-2000 watch you observe the following vessel dead ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
Power driven vessel towing another vessel. She is severely restricted in her ability to deviate from course. The length of the tow is less than 200m.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes. If the vessel towed or if more than one vessel is towed the last vessel of the tow, if manned, shall at intervals not exceeding 2 minutes sound four blasts in succession namely one prolonged blast followed by three short blasts. When practicable this shall be made immediately after the signal made by the towing vessel.
Action/Rule
You should keep clear of her as required by Rule 18 – Responsibilities Between Vessels.
Incorrect
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Question 40 of 56
40. Question
During the 1200-1600 watch you observe the following vessel fine on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel engaged in fishing other than trawling with outlying gear extending more than 150m horizontally from the vessel.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of the vessel – Rule 18 Responsibilities Between Vessels.
Incorrect
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Question 41 of 56
41. Question
During the 0000-0400 watch you observe the following lights dead ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel engaged in dredging or underwater operations restricted in her ability to manoeuver, not making way. She has an obstruction on her left side and it is clear to pass on her right side.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of her and pass down her port side. Rule 18 – Responsibilities between vessels.
Incorrect
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Question 42 of 56
42. Question
During the 2000-0000 watch you observe the following vessel dead ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a power driven vessel less than 50m in length engaged in towing another vessel alongside.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
Both vessels should alter course to starboard so that both pass on the port side of the other. Rule 14 – Head on Situation
Incorrect
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Question 43 of 56
43. Question
During the 2000-0000 watch you observe the following light dead ahead. What could this single white light indicate?
Correct
A single white light could represent the follow:
- Another vessels stern light.
- An anchor light for a vessel less than 50m in length.
- A vessel under oars.
- A power driven vessel less than 7m in length with a maximum speed less than 7kts.
Incorrect
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Question 44 of 56
44. Question
During the 0800-1200 watch you observe the following vessel 7 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel engaged in a towing operation, the length of tow is exceeds 200m.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes. If the vessel towed or if more than one vessel is towed the last vessel of the tow, if manned, shall at intervals not exceeding 2 minutes sound four blasts in succession namely one prolonged blast followed by three short blasts. When practicable this shall be made immediately after the signal made by the towing vessel.
Action/Rule
You should stand on with caution. Rule 15 – Crossing Situation.
Incorrect
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Question 45 of 56
45. Question
During the 0000-0400 watch you observe the following vessel fine on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel not under command, not making way.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of her. Rule 18 – Responsibilities between vessels.
Incorrect
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Question 46 of 56
46. Question
During the 0400-0800 watch you observe the following vessel crossing 5 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a vessel probably more than 50m in length viewed from the starboard side. She is restricted in her ability to manoeuver and is making way.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of her as required by Rule 18 – Responsibilities Between Vessels. The best course of action is a readily apparent alteration of course to port to pass clear around her stern.
Incorrect
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Question 47 of 56
47. Question
During the 0000-0400 watch you observe the following vessel dead ahead. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a power driven vessel less than 50m in length.
Sound Signal in Restricted Visibility
When making way through the water one prolonged blast on the ships whistle at intervals not exceeding 2 minutes. When stopped and not making way through the water two prolonged blast on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
Both vessels should alter course to starboard so that both pass on the port side of the other. Rule 14 – Head on Situation
Incorrect
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Question 48 of 56
48. Question
During the 0200-0400 watch you observe the following fine to port. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a pilot vessel at anchor (if you look closely at the shadow of the vessel you can see that). Otherwise it could be the stern view of a pilot vessel.
Sound Signal in Restricted Visibility
Rapid ringing of the ships bell for 5 seconds at intervals not exceeding 1 minute. If the vessel is 100m or more in length the bell must be sounded in the fore part of the vessel and immediately after the gong shall be sounded rapidly for 5 seconds.
Action/Rule
There is no specific rule that applies for collision avoidance with vessels at anchor. Good seamanship dictates that you should pass astern of the vessel.
Incorrect
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Question 49 of 56
49. Question
During the 0000-0400 watch you observe the following vessel fine on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a power driven vessel probably over 50m in length engaged in towing another vessel alongside.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
Both vessels should alter course to starboard so that both pass on the port side of the other. Rule 14 – Head on Situation.
Incorrect
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Question 50 of 56
50. Question
During the 0000-0400 watch you observe the following vessel 4 points on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a fishing vessel engaged in fishing other than trawling, making way.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of the vessel under Rule 18 – Responsibilities between vessels.
Incorrect
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Question 51 of 56
51. Question
During the 2000-0000 watch you observe the following vessel 3 points on your port bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, its sound signal in restricted visibility, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a fishing vessel engaged in fishing other than trawling, not making way.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes.
Action/Rule
You should keep clear of the vessel under Rule 18 – Responsibilities between vessels.
Incorrect
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Question 52 of 56
52. Question
During the 2000-0000 watch you observe the following lights 6 points on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, any action to be taken and the relevant COLREG rule that applies to the situation.
Correct
Vessel
This is a power driven vessel probably more than 50m in length engaged in a towing operation, the length of tow is less than 200m.
Sound Signal in Restricted Visibility
One prolonged blast followed by two short blasts on the ships whistle at intervals not exceeding 2 minutes. If the vessel towed or if more than one vessel is towed the last vessel of the tow, if manned, shall at intervals not exceeding 2 minutes sound four blasts in succession namely one prolonged blast followed by three short blasts. When practicable this shall be made immediately after the signal made by the towing vessel.
Action/Rule
You should keep out of the way and shall if the circumstances of the case admit avoid crossing ahead of the other vessel. Rule 15 Crossing Situation. Best course of action alter course to starboard and pass clear around the vessels stern.
Incorrect
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Question 53 of 56
53. Question
Rule 3 – General Definitions Defines the word Vessel as…..
Correct
The word “vessel” includes every description of water craft, including non-displacement craft, WIG craft and seaplanes, used or capable of being used as a means of transportation on water.
Incorrect
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Question 54 of 56
54. Question
What is the definition of the term ‘Power Driven Vessel’ under Rule 3 – General Definitions.
Correct
The term “power-driven vessel” means any vessel propelled by machinery.
Incorrect
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Question 55 of 56
55. Question
What is the definition of the term ‘Not Under Command’ under Rule 3 – General Definitions.
Correct
The term “vessel not under command” means a vessel which through some exceptional circumstance is unable to manoeuvre as required by these Rules and is therefore unable to keep out of the way of another vessel.
Incorrect
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Question 56 of 56
56. Question
Rule 3(G) states that the term “vessels restricted in their ability to manoeuvre” shall include but not be limited to which of the following (tick all that apply)
Correct
The full text of rule 3(G) is as follows:
The term “vessel restricted in her ability to manoeuvre” means a vessel which from the nature of her work is restricted in her ability to manoeuvre as required by these Rules and is therefore unable to keep out of the way of another vessel. The term “vessels restricted in their ability to manoeuvre” shall include but not be limited to:
- (i) a vessel engaged in laying, servicing, or picking up a navigation mark, submarine cable or pipeline;
- (ii) a vessel engaged in dredging, surveying or underwater operations;
- (iii) a vessel engaged in replenishment or transferring persons, provisions or cargo while underway;
- (iv) a vessel engaged in the launching or recovery of aircraft;
- (v) a vessel engaged in mine clearance operations;
- (vi) a vessel engaged in a towing operation such as severely restricts the towing vessel and her tow in their ability to deviate from their course.
Incorrect
The full text of rule 3(G) is as follows:
The term “vessel restricted in her ability to manoeuvre” means a vessel which from the nature of her work is restricted in her ability to manoeuvre as required by these Rules and is therefore unable to keep out of the way of another vessel. The term “vessels restricted in their ability to manoeuvre” shall include but not be limited to:
- (i) a vessel engaged in laying, servicing, or picking up a navigation mark, submarine cable or pipeline;
- (ii) a vessel engaged in dredging, surveying or underwater operations;
- (iii) a vessel engaged in replenishment or transferring persons, provisions or cargo while underway;
- (iv) a vessel engaged in the launching or recovery of aircraft;
- (v) a vessel engaged in mine clearance operations;
- (vi) a vessel engaged in a towing operation such as severely restricts the towing vessel and her tow in their ability to deviate from their course.
26. Question
During the 0000-0400 watch you observe the following vessel crossing from right to left 3 points on your starboard bow. You take a series of compass bearings. The vessels bearing is steady and the range is reducing. Identify the vessel, any action to be taken and the relevant COLREG rule that applies to the situation.
Action/Rule
You should keep out of the way and shall if the circumstances of the case admit avoid crossing ahead of the other vessel. Rule 15 Crossing Situation. Best course of action alter course to starboard and pass clear around the vessels stern.
Dear Admin Could you please check / elaborate the above action !
Neeraj, Good spot! Unfortunately the wrong image was shown on this question as the tug and two were crossing left to right instead of right to left. The question has now been updated with the correct image. If you have any other questions don’t hesitate to comment. Thanks for your feedback.
Admin