The primary purpose of a lighthouse is to serve as a navigational aid for maritime pilots at sea or on inland waterways. Lighthouses are designed to emit light and often use distinctive patterns or colors to help sailors identify their location and guide their course. Some lighthouses also produce sound signals or utilize radar systems to enhance navigational safety, particularly in areas with hazards such as rocky coastlines or shallow waters. By marking coastlines, dangerous shoals, and safe entry points to harbors, lighthouses play a crucial role in preventing maritime accidents and ensuring safe passage for vessels.