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

Which letter is represented by this flag?

A X-ray

B Victor

C Echo

D Sierra

Question 2

Two black balls in a vertical line indicate a vessel restricted in her ability to manoeuvre.

A False

B True

Question 3

Which letter is represented by this flag?

A Romeo

B Quebec

C Zulu

D Sierra

Question 4

Indicate the correct answer:

A A fishing vessel less than 50 meters in length engaged in trawling. Making way through the water.

B A fishing vessel more than 50 meters in length engaged in trawling. Making way through the water.

C A vessel under sail but also propelled by a mechanical installation.

D A power-driven vessel less than 20 meters in length. Moving to the left.

Question 5

Indicate the correct answer:

A A power-driven vessel less than 50 meters in length pushing another vessel ahead.

B A fishing vessel less than 50 meters in length engaged in trawling.

C A vessel engaged in dredging or underwater operations, restricted in its ability to maneuver.

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