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

A seaplane is making way on water and meets a sailing vessel underway. Who must give way?

A The seaplane.

B The sailing vessel.

C The vessel with wind on port side.

D It depends on their speed.

Question 2

“When two sailing vessels are approaching one another, and each has the wind on a different side, the vessel which has the wind on the _______ side shall keep out of the way.”

A port.

B windward.

C starboard.

D leeward.

Question 3

A sailing vessel is under sail and has her engine running as well. What is her status under the Rules?

A She is a power-driven vessel.

B She is a sailing vessel.

C She must follow Rule 12.

D She has priority over all others.

Question 4

In a crossing situation, who must give way: a vessel constrained by her draught or a vessel restricted in her ability to manoeuvre?

A CBD must give way to RAM.

B RAM must give way to CBD.

C The larger vessel has priority.

D It depends on the VHF agreement.

Question 5

Which vessels are allowed to use the inshore traffic zone according to Rule 10?

A Vessels less than 20 metres in length.

B Sailing vessels.

C Vessels engaged in fishing.

D Vessels restricted in their ability to manoeuvre.

E Large tankers constrained by their draught.

F Any vessel that chooses to avoid traffic lanes.

COLREG — Regulations for Preventing Collisions at Sea

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