Maritime Master - COLREGs

Stop memorising the regulations. Start mastering them.

Maritime Master - COLREG is the definitive interactive guide to the International Regulations for Preventing Collisions at Sea (COLREGs / IRPCS). Designed for deck officers, yachtmasters, and serious boaters, this app replaces dry textbooks with intuitive visual simulations.

Whether you are preparing for your exams, or simply need a reliable pocket reference at sea, Maritime Master helps you learn faster and retain more.

Most apps just copy-paste the rules. We bring them to life.
Interactive Scenarios: Don’t just read Rule 14 (Head-on) or Rule 15 (Crossing), control the vessels on screen to see exactly who gives way.
Visual Light Sectors: Build the "Mercedes" arc yourself. Finally understand exactly what 112.5°, 135°, and 225° look like in real life.
Smart Quizzes: Test your knowledge with "Exam Trap" questions that highlight common mistakes students make in oral exams.

KEY FEATURES
Complete Rule Book (1-38): Full, searchable text of the Steering and Sailing Rules, perfectly formatted for mobile.
Navigation Lights & Shapes: Toggle between Day, Night, and Fog modes to master Rule 20. See instantly how shapes change for RAM, CBD, NUC, and Fishing vessels.
Restricted Visibility (Rule 19): A dedicated Radar Simulator helps you decide whether to turn to starboard or reduce speed in fog. 
Sound & Distress Signals: Interactive buttons to hear blast patterns (Rule 34/35) and visualize Annex IV distress signals like Red Flares and Smoke. 
Steering Rules Visualized: * Overtaking (Rule 13): Clearly see the overtaking sector vs. crossing.
Narrow Channels (Rule 9): Master positioning and bends. 
TSS (Rule 10): Visualize lane discipline and crossing angles. 
Offline Ready: No internet required. Study in your bunk, on watch (if allowed!), or commuting.

PERFECT FOR:
Student Officers: Cadets, OOW, Chief Mate, Master 3000 (MCA / USCG / International).
Yachting Pros: RYA Yachtmaster Offshore / Ocean, Master 200/500.
Leisure Boaters: Day Skipper, Powerboat Level 2, ICC
Sailing Schools: A perfect visual aid for instructors teaching the Rules of the Road.

INCLUDES:
Part A: General
Part B: Steering and Sailing Rules (Sections I, II, III)
Part C: Lights and Shapes
Part D: Sound and Light Signals
Part E: Exemptions
Annexes (Distress Signals, etc.)

Download Maritime Master - COLREG today and pass your COLREGs exam