IALA Navigation Marks vs Master

Navigation Marks is a compact reference for skippers, sailors and students learning the IALA Maritime Buoyage System. Quickly identify lateral marks for Regions A and B, cardinal marks, isolated danger marks, safe water marks, special marks and new danger marks. Each entry shows the buoy shape, colour scheme, topmark and light rhythm so you can revise recognition rules before a course, exam or time on the water. Why it helps: - Covers the main IALA buoyage marks in one place - Includes day and night views where available - Explains colours, shapes, topmarks and light characteristics - Works as a practical study aid for RYA, IYT and general seamanship training - Built for quick lookup on iPhone and iPad Use Navigation Marks as a pocket study guide when preparing for boating exams, refreshing buoyage rules or checking how a mark should be identified. Questions or suggestions: support@appsforeach.com

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.