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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

Which side of the vessel are you seeing?

A Starboard side

B Port side

C Head-on

D Stern view

Question 2

Which lights identify a vessel constrained by her draught?

A Three all-round red lights in a vertical line.

B Red over red lights.

C Green over white lights.

D Three all-round green lights.

Question 3

The Kilo flag means “I wish to communicate with you.”

A True

B False

Question 4

What is the length of the tow?

A Less than 200 metres

B More than 200 metres

C Exactly 200 metres

D Tow length not specified

Question 5

A power-driven vessel less than 12 meters may display this light configuration.

A True

B False

COLREG – Lights & Shapes Identification

Take This Quiz. Download the GYRO app to take this quiz and track your progress.