Master-Nav: Colregs
In-app purchases
4.5star
253 reviews
Everyone
info
10K+
Downloads
About this app
Master-Nav is a progressive COLREGS learning system developed by a Master Mariner. The Navigation Rules are notoriously difficult to learn and retain — Master-Nav makes it significantly easier through an interactive system built around how your brain actually works.
Instead of guessing through random question banks, Master-Nav guides you step by step through every rule from start to finish. Wrong answers are revisited until the rules stick — properly.
Complex regulations are broken down into learnable chunks — bite-sized sections supported by mnemonics, memory aids and interactive visuals designed around how the brain actually retains information.
Every incorrect answer is shown graphically alongside the correct one — immediately clear, no confusion. And with a single tap, the relevant COLREGS rule is accessible from any question at any time.
Master-Nav covers COLREGS Parts A to D — General, Steering & Sailing, Lights & Shapes and Sound & Light Signals — plus Annex IV Distress Signals. Over 1000 questions in multiple formats, with a dedicated Practice Section that tracks right, wrong and unanswered so you always know where to focus.
COLREGS — the easy way.
Instead of guessing through random question banks, Master-Nav guides you step by step through every rule from start to finish. Wrong answers are revisited until the rules stick — properly.
Complex regulations are broken down into learnable chunks — bite-sized sections supported by mnemonics, memory aids and interactive visuals designed around how the brain actually retains information.
Every incorrect answer is shown graphically alongside the correct one — immediately clear, no confusion. And with a single tap, the relevant COLREGS rule is accessible from any question at any time.
Master-Nav covers COLREGS Parts A to D — General, Steering & Sailing, Lights & Shapes and Sound & Light Signals — plus Annex IV Distress Signals. Over 1000 questions in multiple formats, with a dedicated Practice Section that tracks right, wrong and unanswered so you always know where to focus.
COLREGS — the easy way.
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Ratings and reviews
4.5
234 reviews
Abhijeet Darekar
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May 9, 2026
5 Stars! This app is excellent for studying. It makes complex rules very easy to understand and has helped me a lot with my exam preparation. Highly recommended for any maritime student!
FLORENCE ONIKRE
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May 13, 2026
This app is recommended for marine beginners and also for those who what to master COLREG without no time. Highly recommend
Jean-Paul da Conceicao
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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!
2 people found this review helpful
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
New Settings screen: text size, text brightness, and skip-alert toggle. Plus
tablet and landscape polish.
tablet and landscape polish.
App support
About the developer
Natasha Alexandra Burdekin
natburd.dev@gmail.com
Chomlea House
Hadfield Road
GLOSSOP
SK13 2ER
United Kingdom
