Colregs: lights and shapes

Colregs: lights and shapes is a practical maritime navigation reference app that helps sailors, skippers, and students quickly identify navigation lights, day shapes, and the corresponding COLREGs rules. It delivers a clear visual library, fast search, and concise rule summaries for safer watch-keeping and efficient training at sea or in the classroom. Ideal for boating safety, sailing training, and exam prep, this maritime navigation app works reliably offline when you need it most. Core features - Visual library of vessel navigation lights and day shapes with plain-language explanations and rule references - Quick search and smart filters by vessel type, status, color pattern, and arrangement for rapid identification - Offline access and favorites for instant, at-sea lookup without connectivity