Master-Nav vs COLREG 72: safety at sea使用状況と統計

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.

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COLREG 72: safety at sea

COLREG 72 is a complete study and reference app for the International Regulations for Preventing Collisions at Sea (COLREGs). Built for maritime students, merchant navy officers, yacht captains, and anyone preparing for a maritime exam. WHAT IS INCLUDED - Full text of all 72 COLREG rules (Annexes I through IV) - Theory study with illustrations - Navigation lights identification quizzes - Rule-based tests with answer explanations - Cross-references between rules and theory — open in popup overlays so you never lose your place HOW IT WORKS Theory and rules are linked throughout the app. When you answer a quiz question incorrectly or open a hint, a direct link appears to the exact theory section that covers the topic. Review the rule, then return to the quiz. The app tracks which theory sections you have read, so you always know where you left off and what still needs attention. Reading is fully customisable: choose from multiple font types, adjust the font size, and switch between three colour themes — light, sepia, and dark — for comfortable study in any lighting condition. WHO IT IS FOR - Maritime students at nautical colleges and academies - Merchant navy officers preparing for OOW, Chief Mate, or Master exams - Yacht skippers and RYA / ASA candidates - Coastal and offshore sailors who need a reliable collision avoidance reference - Anyone sitting a maritime authority exam (MCA, USCG, AMSA, Transport Canada, MNI) WHY COLREG 72 International collision avoidance rules are the foundation of safe navigation. Whether you are studying for the first time or refreshing knowledge before an exam, this app gives you the full text, visual aids, and practice tests to build real confidence. One-time purchase. No subscription. No ads. Study offline, anytime. Download COLREG 72 and arrive at your exam prepared.