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

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”.

Question 2

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

A True.

B False.

Question 3

A vessel that strictly follows the COLREGs can never be held responsible for a collision.

A False.

B True.

Question 4

You are the OOW on a small cargo ship in a fairway. You detect a large LNG carrier showing three all-round red lights in a vertical line. What does this mean?

A The vessel is constrained by her draught.

B The vessel is aground.

C The vessel is restricted in its ability to manoeuvre.

D The vessel is fishing.

Question 5

A fishing vessel engaged in trawling observes a vessel not under command (NUC) drifting across her bow. What must she do?

A Stop and maintain distance.

B Continue fishing.

C Sound five blasts and wait.

D Give sound signal and pass ahead.

COLREG — Regulations for Preventing Collisions at Sea

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