Fog ALL0-9ABCDEFGHIJKLMNOPQRSTUVWXYZVisibility reduced to less than 1000 metres (approximately 0.5 nautical miles) Related content: Rules of the RoadKnowing the rules (the highway code for the water) will keep you safe and confident about what to do when approaching another vessel. Learn the rules & how to interpret them. Approximately 3 hoursIRPCS: International Regulations for Preventing Collisions at Sea« Back to Glossary Index
