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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

The vessel is engaged in trawling.

A True

B False

Question 2

This vessel is engaged in fishing.

A False

B True

Question 3

What is the vessel doing?

A Fishing using methods other than trawling

B Restricted in her ability to manoeuvre

C Engaged in trawling operations

D Sailing under sail only

E Towing another vessel

Question 4

Which vessel may legally display only one white light when seen from astern at night?

A Vessel engaged in fishing

B Vessel constrained by her draught

C Vessel not under command

D Sailing vessel underway. Seen from astern

E Vessel engaged in towing astern

Question 5

Select all correct answers:

A Power-driven vessel, longer than 50 meters, underway.

B Power-driven vessel, less than 50 meters long, engaged in towing operations.

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

COLREG – Lights & Shapes Identification

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