Sail Safe vs Master

Sail Safe Master vessel lights, day shapes, buoys and COLREGs with an intuitive maritime reference and learning companion designed for sailors, skippers, cadets and boating enthusiasts. Features • 280+ illustrated signals Browse an extensive collection of vessel lights, day shapes and buoyage cards with clear explanations and associated sound signals. • Complete COLREGs reference Study the International Regulations for Preventing Collisions at Sea with an easy-to-navigate rule browser. • Interactive quizzes Test your knowledge with multiple-choice quizzes and receive immediate feedback. • Instant search Find lights, shapes, marks or rules within seconds. • Favourites Save important cards and build a personal revision deck. • Works offline No internet connection required after installation. Ideal for: • Merchant Navy cadets • Yacht skippers • Sailing crews • Recreational boaters • Maritime students • Anyone preparing for oral examinations or competency certificates Disclaimer This application is intended for educational and reference purposes only and must not be used as a substitute for official nautical publications, professional training or navigational judgement.

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.