Master vs IRPCS

Master-Nav: COLREGS IALA Tests is a free practice app developed by a Master Mariner with 30 years of seagoing experience. Test your knowledge of the USCG Navigation Rules and IALA Maritime Buoyage System — the regulations every mariner needs to know. A straightforward way to find out where you stand, identify gaps in your knowledge and track your progress over time. Master COLREGS & IALA — the easy way.

IRPCS is a focused training app for learning, revising and practising the International Regulations for Preventing Collisions at Sea, commonly known as IRPCS or COLREGS. Built for skippers, SAR crew, lifeboat crews, maritime students, professional mariners and everyday boaters, IRPCS helps turn complex collision regulations into practical knowledge you can understand, remember and apply on the water. Whether you are preparing for an RYA, MCA or STCW assessment, supporting Search and Rescue training, refreshing your knowledge before going afloat, or improving your confidence with collision avoidance, IRPCS gives you a clear and structured way to study the rules that keep vessels safe at sea. The app covers all IRPCS/COLREGS rules, combining the official rule text with plain-English explanations, from experienced professionals. This helps you move beyond memorising wording and understand what each rule means in real situations, including who gives way, what action to take, how vessels should behave in restricted visibility, and how lights, shapes and sound signals are used. IRPCS is designed for regular practice. Use bite-sized lessons, adaptive quizzes and realistic maritime scenarios to build confidence step by step. Track your progress, identify weak areas and return to the topics that need more work. Key features include: • All IRPCS/COLREGS rules in one place • Official rule text with clear plain-English explanations • Adaptive quizzes to help identify weak areas • Realistic collision avoidance scenarios • Lights, shapes and sound signal practice • Progress tracking to monitor improvement • Offline access for use while travelling or at sea • Useful for SAR, lifeboat, commercial and leisure users • Suitable for beginners, trainees and experienced mariners IRPCS is useful for: • RYA Day Skipper, Coastal Skipper and Yachtmaster preparation • MCA and STCW maritime training • Search and Rescue crew development • Lifeboat crew training and revision • Commercial vessel operators • Sailing, motor boating and powerboat users • Harbour, inshore and coastal navigation • Refreshing knowledge before going afloat From steering and sailing rules to responsibilities between vessels, navigation lights, day shapes, sound signals, conduct in restricted visibility and actions to avoid collision, IRPCS helps you practise the knowledge that matters at sea. Learn the rules. Test your understanding. Build confidence. Stay safer on the water. Download IRPCS and start improving your COLREGS knowledge today. Subscription terms: IRPCS may offer auto-renewing subscriptions that provide access to premium learning, revision and practice features. Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://irpcs.app/privacy IRPCS Terms: https://irpcs.app/terms