Lights and Shapes vs Master

Experience maritime rules like never before! This app helps you master navigation lights and shapes with interactive 3D models you can rotate and zoom. Instantly see how the appearance of vessels changes from different angles—day or night. Identify any ship, understand its route, and know the right of way to avoid collisions. Perfect for boaters, students, and maritime professionals. Features: - Official text of the rules - 30 interactive 3D vessel models (day & night views) - 50+ flashcards for quick recognition and self-testing Make learning the rules of the sea engaging and effective!

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.