Amazing.
Honestly, great app. I really recommend it to people who want to study effectively because textbooks don’t do it like this.
Great app!!
Great App / Good training /Challenging.
Excellent study tool .
Excellent study tool .
Free
About
Practice maritime navigation rules and buoyage systems with this app. It helps you identify knowledge gaps and track your progress in mastering essential regulations for mariners.
✓USCG Navigation Rules practice
✓IALA Maritime Buoyage System tests
✓Knowledge gap identification
✓Progress tracking
✓Developed by Master Mariner
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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.
User reviews
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FAQ
What is Master-Nav primarily used for?
Master-Nav is used to practice and test your knowledge of USCG Navigation Rules and the IALA Maritime Buoyage System, essential regulations for mariners.
Who developed Master-Nav?
Master-Nav was developed by Peterjohn Chisholm, a Master Mariner with 30 years of seagoing experience, ensuring practical and expert-level content.
How does Master-Nav help users improve?
The app provides a straightforward way to assess your current knowledge, pinpoint areas needing improvement, and monitor your learning progress over time.
Is Master-Nav available on multiple devices?
Currently, Master-Nav is supported on iPhones. Information regarding availability on other devices like Android or tablets is not provided.
How often is Master-Nav updated?
The latest version of Master-Nav is 1.5, and it was last updated on June 15, 2026. This indicates a recent update, suggesting ongoing development.
What is the age rating for Master-Nav?
Master-Nav has an age rating of 4+, making it suitable for a wide range of users interested in maritime education.
Does Master-Nav have ads?
No, Master-Nav does not contain advertisements. It is a free app without any ad interruptions.
Are there different subscription tiers for Master-Nav?
Master-Nav is a free application and does not offer subscription tiers. All features are available without any cost.
