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COLREG

CBT 91 questions

First 5 of 91 questions — with answers

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  1. Question 1

    A bearing is taken of an approaching vessel and shortly afterwards another observation is made of the same vessel. The bearing is changing slowly, but under what circumstances (as defined in the Rules) could there still be a risk of a collision in this situation?
    • All of the suggested answers.
    • When approaching a very large vessel.
    • When approaching a vessel at close range.
    • When approaching a vessel engaged in towing.

  2. Question 2

    A power driven vessel is sighted coming towards own ship from 45° on the port side and the bearing is not changing and it is getting closer and appears to be taking no action. You have sounded five or more short and rapid blasts and it still appears to be taking no action. As "stand-on" vessel can you take action under the rules at this time?
    • Your vessel may take action to avoid collision by her manoeuvre alone, as soon as it becomes apparent to you, that the vessel required to keep out of the way is not taking appropriate action.
    • You must take substantial action altering your course to the port and give two short blasts.
    • You must take substantial action and give one short blast and change your course to the starboard.
    • You must take substantial action and give two short blasts and change your course to the starboard.

  3. Question 3

    A power driven vessel is sighted coming towards own ship from 45° on the port side at a distance of 5 nautical miles and the bearing is not changing. What is the initial action you should take?
    • There is a risk of close quarter situation, but the other ship is the "give way" ship, so I should maintain my course and speed, but monitor the situation.
    • There is a risk of a close quarter situation, but I am the "give way" vessel and therefore I shall keep well clear of the other ship.
    • There is no risk of a close quarter situation and therefore I should maintain my speed and course.
    • There is a risk of a close quarter situation and therefore both vessels should give way to the other.

  4. Question 4

    A power driven vessel is sighted coming towards own ship from 45° on the port side at a distance of 2 nautical miles and the bearing is still not changing. What is the first action you should take?
    • There is a close quarter situation developing and the other vessel is not keeping clear therefore I would sound at least 5 short and rapid blasts to indicate my concern and monitor the situation.
    • There is a close quarter situation developing, but I am the "give way" vessel and therefore I shall keep well clear of the other ship.
    • There is a close quarter situation developing and the other vessel is the "keep clear" vessel, therefore I should maintain my speed and course.
    • There is a close quarter situation developing and under the Rules both vessels should give way to the other.

  5. Question 5

    A power driven vessel sees the two masthead lights in line and both side lights of another power driven vessel 15° on her starboard bow. Should the vessel assume this is a "head-on" situation and expect both vessels to alter to starboard?
    • No, but because there is doubt, it can be assumed a head-on situation.
    • Yes, but a small alteration to port would avoid a close quarter situation.
    • Yes, it is a head-on situation.
    • No, it is a crossing vessel and not a head-on situation.

Preview — 5 of 91 questions

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About this CBT test

COLREG is a CBT test with 91 questions and verified answers. Common topics include: officer watch, power driven, narrow channel, port side, black balls, close quarter, vertical line, action rules.

You can practise the free questions online — one at a time, with the correct answer — or unlock the whole test and download it to study offline, without internet.

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