Bridge Navigation & Deck Operations

COLREGs - Collision Avoidance Scenarios

Test your practical knowledge of COLREG by solving real collision avoidance scenarios. Evaluate encounter situations, identify the correct Rule, and choose the safest action in accordance with the International Regulations for Preventing Collisions at Sea. Suitable for deck officers, masters, and cadets.

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 Rhumb Line cuts all meridians at the same angle.

A True

B False.

Question 2

Thick fog suddenly sets in while you are the Officer of the Watch. Which actions should you take?

A Reduce to a safe speed appropriate to the prevailing conditions.

B Properly tune and continuously monitor the radar/ARPA.

C Continue normal speed until another vessel is detected.

D Rely mainly on visual lookout until the fog clears.

E Alter course to starboard immediately without assessing the situation.

Question 3

A ship's compass error is 3.8° East and the local variation is 3.0° West. What is the vessel's magnetic deviation?

A 6.8° East.

B 0.8° East.

C 6.8° West.

D 3.8° West.

Question 4

Which statement correctly defines a vessel engaged in fishing?

A A vessel fishing with nets, lines, trawls, or other fishing apparatus that restrict its manoeuvrability.

B A vessel using trolling lines that do not restrict its manoeuvrability.

C Any vessel carrying fishing equipment, whether fishing or not.

D Any vessel operating within a designated fishing area.

Question 5

What is the correct day shape displayed by a vessel Restricted in Her Ability to Manoeuvre (RAM) while underway?

A Ball – Diamond – Ball in a vertical line.

B A black cylinder.

C Two black cones with their apexes together.

D Two black balls in a vertical line.

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