Learn Navigation Lights & Shapes

The app for Navigators of Sailboats, Power Boats and Commercial Vessels, Worldwide

Colregs: Nav Lights & Shapes App provides skippers and crew of recreational and commercial vessels with a quick reference tool to help them identify vessels in their vicinity and the activities they are engaged in, as specified in Part C: “Lights and Shapes” (Rules 20-31) of the International Regulations for Preventing Collisions at Sea (IRPCS) or ColRegs. Whether learning or revising ashore, or when navigating in poor visibility or darkness, simply open the app and quickly find the appropriate nav lights configuration to help identify the types of vessel and their aspect, or the day shapes displayed in daylight. Then read the relevant ColRegs rule beneath the graphic for a detailed explanation.