⚓ Why Navigation Lights Matter — Even in the Age of Radar Not all vessels are required to carry radar. And even if they do, radar, ARPA, ECDIS, AIS—any equipment—can fail at the worst possible time. That’s why the Rules of the Road went back to basics. COLREGs rely first on what you can see. Standardized navigation lights were designed so that, using your eyes alone, you can determine where a vessel is going and what situation you are in. 🔴 Red on port. 🟢 Green on starboard. ⚪ Masthead light t