COLREG 72 is a complete study and reference app for the International Regulations for Preventing Collisions at Sea (COLREGs). Built for maritime students, merchant navy officers, yacht captains, and anyone preparing for a Transport Canada or international maritime exam.
WHAT IS INCLUDED
- Full text of all 72 COLREG rules (Annexes I through IV)
- Theory study with illustrations
- Navigation lights identification quizzes
- Light placement quizzes — put the lights on the vessel silhouette yourself (74 questions, Rules 23–30)
- Rule-based tests with answer explanations
- Exam mode — a timed mock exam across all the rules with a final score and a full mistake review
- Cross-references between rules and theory — open in popup overlays so you never lose your place
HOW IT WORKS
Theory and rules are linked throughout the app. When you answer a quiz question incorrectly or open a hint, a direct link appears to the exact theory section that covers the topic. Review the rule, then return to the quiz.
The app tracks which theory sections you have read, so you always know where you left off and what still needs attention.
EXAM MODE
Practice under exam-like conditions. The exam is timed and draws questions from across all the rules. When time runs out, you get a clean result screen with your score and every mistake listed. Tap a wrong answer to see the explanation, the original comment from the question card, and a direct link to the relevant rule — so every attempt teaches you something.
READING
Reading is fully customizable: choose from multiple font types, adjust the font size, and switch between three color themes — light, sepia, and dark — for comfortable study in any lighting condition. Layouts are tuned for both iPhone and iPad.
WHO IT IS FOR
- Maritime students at nautical colleges and academies
- Merchant navy officers and Transport Canada certificate of competency candidates
- Yacht skippers and offshore sailors
- Coastal and recreational boaters who need a reliable collision avoidance reference
- Anyone preparing for a Transport Canada or international maritime authority exam
WHY COLREG 72
International collision avoidance rules are the foundation of safe navigation. Whether you are studying for the first time or refreshing your knowledge before an exam, this app gives you the full text, visual aids, practice tests, and a timed practice exam to build true confidence.
One-time purchase. No subscription. No ads. Study offline, anytime.
Download COLREG 72 and arrive at your exam prepared.
COLREG 72 is an independent study app. It is not affiliated with or endorsed by the IMO, the U.S. Coast Guard or any maritime authority, and its practice questions are not official exam questions.
Нужно добавить Английский язык в правила, будет гораздо лучше!
Developer Response
Уважаемый пользователь!Благодарим Вас за то, что Вы с нами. Информируем Вас, что с момента первого релиза в AppStore наше приложение имело англоязычный интерфейс. Для его активации необходимо установить английский язык в настройках Вашего устройства.Также рады сообщить, что приложение полностью переведено на испанский и французский языки.
Vessel lights
Tanyasd23
Need to have a feature to answer questions from all rules at random.
Developer Response
Thank you for your suggestion!At the moment, this functionality is already partially available: once you reset your answers, all questions are automatically reshuffled and presented again in a random order across all rules. This allows you to revisit the material in a fresh and unpredictable sequence, which is great for improving retention and testing your knowledge.We truly appreciate your feedback and are always looking for ways to make the learning experience even better!
German
The app is now fully available in German: interface, rule texts, theory and all questions.
Back to tests
When you finish a test, the completion dialog now offers Back to tests instead of Cancel.
Place the Lights: corrected vessel silhouettes and light positions, clearer wording in several questions (optional lights, pushing vessels, towed objects, anchor lights). Text fixes in light questions, rule texts and translations.
Version 2.8.2
The developer, Smirnov Yury, 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.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More