Master-Nav: IALA

Master the IALA Maritime Buoyage System the easy way — with clear visuals, step-by-step learning, and exam-style practice.

Developed by a Master Mariner with 30 years of seagoing experience, Master-Nav: IALA is designed around how mariners actually learn: visual recognition, simple explanations, memory aids, and answer phrasing that matches how the rules are examined.

LEARN THEN PRACTICE
Start in Learning mode to build understanding step by step. Each topic is broken down with clear diagrams and concise explanations. When you are ready, move into Practice mode to test yourself with realistic questions and graphic answers.

WHAT'S COVERED
• Lateral marks — IALA Region A and Region B
• Cardinal marks — North, South, East, West
• Isolated danger marks
• Safe water marks
• Special marks
• Emergency wreck marking buoys
• Light rhythms and patterns — fixed, occulting, isophase, flashing, quick, very quick, and more
• Topmarks, colours, and shapes

KEY FEATURES
• Visual-first approach — learn through clear, colour-coded diagrams
• Exam-style practice questions with detailed explanations
• Light pattern animations and recognition exercises
• Track your progress and identify gaps in your knowledge
• Clean, dark-friendly interface designed for easy reading
• No ads — just focused learning

BUILT FOR MARINERS
Whether you are preparing for your OOW, Master, Yachtmaster, or USCG exam, or simply want to refresh your knowledge, Master-Nav: IALA gives you a practical, no-nonsense way to learn the buoyage system.

Created and maintained by a single developer. Built to help — not to sell.

Recent changes:
• NEW: While studying, you can now tap the back arrow to return to
the previous page — handy for re-reading a light characteristic
or a mark description before moving on. The device back button
does the same.