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International Maritime Regulations

COLREG — Regulations for Preventing Collisions at Sea

This test assesses your basic understanding of the International Regulations for Preventing Collisions at Sea (COLREG). The focus is on general definitions, allocation of responsibilities between vessels, principles of safe navigation, and actions in different situations. Navigation lights and day shapes are not included in this module, as they are covered separately.

Questions 15

Time Limit 9 min

Language English

Sample Questions

Here are some example questions from this quiz. Download the GYRO app to take the full test.

Question 1

Rule 13 takes precedence over Rules 14–18 in cases of overtaking.

A True.

B False.

Question 2

You are the give-way vessel in a crossing situation. You waited too long and now risk of collision is immediate. What should the stand-on vessel do?

A Take action to avoid collision.

B Alter course to port immediately.

C Stop engines.

D Maintain course and call on VHF.

Question 3

What defines a “vessel not under command” under Rule 3(f)?

A A vessel which cannot manoeuvre due to exceptional circumstances such as steering gear failure.

B A vessel aground, unable to manoeuvre.

C An unmanned vessel.

D A vessel constrained by her draught.

Question 4

Rule 19 applies only when vessels are in visual sight of each other.

A False.

B True.

Question 5

Which of the following is an exact quote from Rule 9(d)?

A “A vessel shall not cross a narrow channel if such crossing impedes another vessel”.

B “All vessels shall cross narrow channels at right angles”.

C “Fishing vessels are not subject to this rule”.

D “The give-way vessel must sound a one short blast”.

COLREG — Regulations for Preventing Collisions at Sea

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