Master-Nav: Colregs

In-app purchases
4.5
203 reviews
10K+
Downloads
Content rating
Everyone
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About this app

Master-Nav makes learning COLREGS easy with its comprehensive learning system that leverages the natural learning mechanisms of the brain. Our goal is to simplify your preparation for maritime qualifications and maximise your success. Instead of diving into dense rule books, our application uses interactive visuals, memory aids, and exam answer phrases for an engaging and intuitive learning experience.

Start with the Learning Section to understand the rules step by step, then move to the Practice Section to reinforce your knowledge and improve your performance. Master-Nav covers COLREGS Part A to Part D (Rules 1-37) and the distress signals found in Annex IV thoroughly. With over 1000 questions in various formats, each supported by clear graphic answers highlighting errors, Master-Nav reinforces your knowledge through repeated practice, making rule retention effortless.

Our app-wide Rule button simplifies navigating the COLREGS Rule book. A single click gives you quick access to the relevant COLREG rule for the question at hand, saving valuable study time.

To make complex rules with technical terminology more understandable, we provide explanations in simple language. We understand that maritime regulations can be dense, especially for newcomers to the field.

Whether you're a cadet starting your maritime career or an experienced mariner refreshing your understanding of the COLREGS, Master-Nav is the ideal learning tool. Experience the convenience, effectiveness, and painless rule memorisation our app provides.
Updated on
Nov 25, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Device or other IDs
This app may collect these data types
Financial info and Device or other IDs
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.5
190 reviews
Isaac Kell Duivestein
November 11, 2025
Best resource for effective learning of COLREGS I've come across. This app has changed the game for me, I struggled before, this has made everything straight forward by following a logical path, constant revision, ability to immediately bring up the relevant regulation and with ability to review any section any time. $3.99 AUD one time payment for the premium has been worth it.
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Cody Lewis
November 25, 2025
This app is for international rules and does a great job. Customer support is superb and resolved an error within a few hours.
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NAB DEV
November 25, 2025
Thanks for your review. We have checked the question logic multiple times, so this is surprising and we’d really like to investigate. Please be so kind to send a screenshot of the question and your selected answer using the support email link in the app. Thank you.
Jean-Paul da Conceicao
February 22, 2025
Great app but I would say one weakness is the mnemonics. Mnemonics should be short and memorable, and optional. These are often long and arbitrary, they don't help me memorise things at all. The interface when being tested on them is tedious as well, seems to have problems with my samsung's keyboard app. But other than that useful app for a fair price, thanks!
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NAB DEV
April 25, 2025
Thanks for the feedback! The latest update lets you skip mnemonic questions. While I’ve found them great for exam recall, they’re now optional. Sorry about the keyboard issue — feel free to reach out via the Contact button and I’ll look into it. Glad you’re enjoying the app!

What’s new

Bug fixes and improvements.

App support

About the developer
Natasha Alexandra Burdekin
natburd.dev@gmail.com
Chomlea House Hadfield Road GLOSSOP SK13 2ER United Kingdom
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