Master-Nav: COLREGS IALA Tests
Practice Maritime Rules Daily
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Free
About
Master-Nav: COLREGS IALA Tests is a free practice app developed by a Master Mariner with 30 years of seagoing experience.
Test your knowledge of the USCG Navigation Rules and IALA Maritime Buoyage System — the regulations every mariner needs to know.
A straightforward way to find out where you stand, identify gaps in your knowledge and track your progress over time.
Master COLREGS & IALA — the easy way.
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What's New in Master
1.5
June 15, 2026
ROR International, Inland and IALA MBS exam practice tool, developed by a Master Mariner. Test your knowledge of the rules.
