Master vs Morse

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.

Learn International Morse code with short, structured lessons and a relaxed practice playground. Hear clean tone practice at ITU-style timing, tap along, and build real recognition not just memorizing a chart. HOW IT WORKS • Ops path: work through units, lessons, and reviews at your pace. • Playground: practice letters and words, see or hear the challenge, then send your answer. • Progress stays on your device; pick up where you left off. MORSE PRO Subscribe to Morse Pro for an ad-free experience. Free tier may show ads. REQUIREMENTS • Designed for iPhone. Requires iOS 17 or later. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/