Master vs Compass Revision

Master-Nav is a progressive COLREGS learning system developed by a Master Mariner. The COLREGS 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.

Make more sense of sailing theory, one topic at a time. Compass Revision brings 31 independent course companions into one place. Explore navigation, tides, COLREGs, buoyage, marine radio and seamanship, with focused lessons and questions that help you work out what to study next. FIND YOUR COURSE Browse regional course collections and try free sample topics before signing in. Choose the subject and level that fit your plans, from introductory boating knowledge to more advanced theory revision. TURN READING INTO RECALL Read a lesson, practise topic questions and learn from the explanations. Use a Quick 10 session when time is short, revisit incorrect answers, save useful questions and try timed mock tests. Your progress helps you return to the topics that need more work. KEEP YOUR LEARNING TOGETHER Sign in to see your owned courses on Home and switch between them. Sync your learning with your Compass account when connected, so you can pick up across your devices. TAKE YOUR STUDY OFFLINE Download an owned course while connected, then read its lessons and practise without an internet connection. Free samples are also available offline. Reconnect to sync your progress. Signing in, purchasing, restoring purchases and downloading new content require internet access. PRACTISE MARINE RADIO Marine Radio course owners can open the simulator inside the app to build and check training calls. The simulator requires an internet connection. Microphone practice is optional, with permission and information about audio processing before use. Separate speaking cards let you rehearse offline without recording. CHOOSE THE ACCESS YOU NEED Start with free samples without creating an account. Full courses are optional one-time in-app purchases, not subscriptions, with the price shown before you buy. Existing Compass learners can sign in to access courses they already own. Restore purchases is available in Account. INDEPENDENT LEARNING SUPPORT Compass Revision is an independent educational study aid, not an official RYA training provider. It does not award qualifications or certify practical competence. It is not a navigation or emergency-response tool and does not replace official publications, local rules, qualified instruction or safe real-world judgement. Privacy: https://www.compassrevision.com/privacy Terms: https://www.compassrevision.com/terms Support: https://www.compassrevision.com/contact