Marinus: maritime rules

Marinus: maritime rules

COLREGs, IRPCS, IALA & more!

214 ratings
61 reviews
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • July 4, 2012
  • December 2, 2025

Features

Marinus: maritime rules screenshot #1 for iPhone
Marinus: maritime rules screenshot #2 for iPhone
Marinus: maritime rules screenshot #3 for iPhone
Marinus: maritime rules screenshot #4 for iPhone
Marinus: maritime rules screenshot #5 for iPhone
Marinus: maritime rules screenshot #6 for iPhone
Marinus: maritime rules screenshot #7 for iPhone
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About

This app provides comprehensive guidance on maritime navigation rules and signals. It offers detailed information on flags, lights, sounds, and buoyage systems, along with interactive quizzes and a map feature. Designed for sailors, it ensures safe navigation on any vessel.

Maritime flags and meanings
Weather scales and cloud identification
Sound signal guidance
Vessel navigation light diagrams
Day shape identification
Safe navigation maneuvers
Morse code decoder
IALA Buoyage System
Radio communication guidelines
COLREGs text
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What's New in Marinus

5.3.1

December 2, 2025

New section available! SMCP (Standard Marine Communication Phrases): you can now access standard maritime phrases in English directly from the app. Other improvements: • Optimized ad system for a better user experience. • Implemented a new analytics system to keep improving the app.

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Subscription plans

Marinus PRO

Full access to features and content.

$8.991 Year
3 Days trial
How to cancel Marinus subscription ⁉️

User reviews

Broken

The app isn’t working. The first ad loads then wont clear to allow you into the material.

Wouldn’t recommend

Unfortunately this app has turned into a money grab with its subscription.
Originally paid the full price for the app, but now it prompts me to subscribe, have tried to contact, with no response.
Would look elsewhere for training guides as you will easily find better value.

Swamped with Ads

Absolute rubbish now as it is swamped with LONG advertising. I have deleted it.

Sold Themselves Out To Google

Never use to have ads. Can’t use it because the ads are just so thick and constant. It was good but not now.

Vraiment très bien

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Developer apps

FAQ

What does the Marinus app do?

Marinus is an app designed for sailors that provides comprehensive information on maritime navigation rules and safety. It covers topics like COLREGs, flags, lights, sounds, day shapes, and buoyage systems, offering clear guidance for safe navigation on sailboats and motorboats.

What are the key features of Marinus?

Key features include detailed information on maritime flags, weather scales, sound signals, vessel navigation lights, day shapes, safe maneuvers, Morse code, the IALA Buoyage System, radio communication guidelines, and the full text of COLREGs. It also offers interactive quizzes and a map for visualizing concepts.

How much does Marinus cost?

The app offers free features, but access to all PRO features requires an affordable annual subscription. This subscription helps support the ongoing maintenance and improvement of the app.

What kind of devices is Marinus compatible with?

The app is available for iPhone and is trusted by thousands of sailors. Specific iOS version compatibility is not detailed, but it's designed for use on mobile devices.

Who would benefit from using Marinus?

Marinus is ideal for anyone involved in maritime navigation, including experienced sailors and those just beginning their nautical journey. It serves as an essential tool for ensuring safe navigation and understanding international regulations.