Marine Nav Lights Trainer
COLREG rules revision
$4.99
Master navigation. This app helps you train your eye, build confidence so you can identify vessels quickly and make the right decisions at sea. Navigate with certainty.
Master COLREGs navigation lights and day shapes with a professional spaced-repetition trainer designed for both real exams and real-world navigation.
This app is a focused educational and revision tool for sailors, skippers, and maritime students who want an efficient way to learn, retain, and periodically refresh their understanding of the International Regulations for Preventing Collisions at Sea (COLREGs).
It is designed for serious learners — including professional and advanced recreational mariners — who want a clear, distraction-free way to revisit complex rules, lights, shapes, and scenarios.
Designed for long-term retention
The app presents key COLREGs concepts in a structured, study-oriented format.
By combining visual recognition with active recall and spaced repetition, it helps reinforce knowledge over time — making it suitable not only for exam preparation, but also for regular refresher use (for example every 6–12 months).
Key features
• Structured review of COLREGs navigation lights and shapes
• Clear visual presentation of lights, shapes, and signals
• Question-and-answer format to actively test understanding
• Study, practice, and exam-style learning modes
• Progress tracking stored locally on your device
• Fully offline use after installation
• No accounts, no ads, no tracking
Built for focused study
This app is intentionally simple and distraction-free.
There are no advertisements, no subscriptions, and no internet dependency — just a reliable study tool you can use anywhere, anytime.
Important notice
This app is for training and revision purposes only.
It does not provide real-time navigation assistance, operational decision-making, or situational awareness, and it does not replace official publications, onboard instruments, or professional judgment.
You remain fully responsible for safe navigation and compliance with applicable regulations at all times.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Study mode now has explanation texts for the different vessel types for quick revision
The developer, Kai Mattern, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kai Mattern
- Size
- 47.5 MB
- Category
- Education
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later.
- iPhone
- Languages
- English and Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 Kai Mattern
