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Bridge Navigation & Deck Operations

COLREG – Lights & Shapes Identification

This test focuses on COLREG requirements regarding navigation lights and day shapes. It assesses your ability to identify vessel types, status, and movements based on visual signals. The questions are designed to reinforce knowledge of lights and shapes essential for safe watchkeeping at sea.

Questions 18

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

Select the correct answer:

A Power-driven vessel, less than 12 meters long, underway, moving away from us.

B Power-driven vessel, less than 50 meters long, underway.

C Power-driven vessel, less than 20 meters long, underway.

Question 2

What is the vessel’s approximate length based on the lights shown?

A Less than 20 meters

B 20–30 meters

C Less than 50 meters

D Over 50 meters

Question 3

What is the length of this vessel?

A The vessel is more than 50 metres in length.

B The vessel is less than 50 metres in length.

C The vessel’s length cannot be determined from these lights.

Question 4

This vessel is fishing by trawling and is seen head-on.

A True

B False

Question 5

Select all correct answers:

A Power-driven vessel, less than 7 meters long, underway, with a maximum speed not exceeding 7 kn.

B Power-driven vessel, less than 12 meters long, underway.

C Power-driven vessel, less than 50 meters long, underway.

COLREG – Lights & Shapes Identification

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