Master Maritime Rules

Free COLREG & IALA study — quizzes, visual references, exam practice

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·38 COLREG rules · 200+ questions · Free foreverIMO 2026

COLREG Rules

Official Simulation

Full exam, just like the real test

Test by Topics

Practice on specific topics

Study Theory

Review all the theory by topics

Quick Sprint

5 quick questions

IALA Buoyage

Official Simulation

Full exam, just like the real test

Test by Topics

Practice on specific topics

Study Theory

Review all the theory by topics

Quick Sprint

5 quick questions

Lights & Shapes

Official Simulation

Full exam, just like the real test

Test by Topics

Practice on specific topics

Study Theory

Review all the theory by topics

Quick Sprint

5 quick questions

Sound Signals

Official Simulation

Full exam, just like the real test

Test by Topics

Practice on specific topics

Study Theory

Review all the theory by topics

Quick Sprint

5 quick questions

Cardinal & Lateral Marks

Official Simulation

Full exam, just like the real test

Test by Topics

Practice on specific topics

Study Theory

Review all the theory by topics

Quick Sprint

5 quick questions

Restricted Visibility

Official Simulation

Full exam, just like the real test

Test by Topics

Practice on specific topics

Study Theory

Review all the theory by topics

Quick Sprint

5 quick questions

Mixed Practice

General Simulation

30 questions from all topics

Mixed Test

15 random questions across topics

Review Mistakes

Practice your wrong answers

General Sprint

5 quick questions, any topic