The symbol for a lighthouse or other fixed light is a black _______________ with a magenta _________________.

The symbol for a lighthouse or other fixed light is represented as a black circle with a magenta line. This visualization is standardized in nautical navigation to provide a clear and recognizable image of fixed navigational aids such as lighthouses. The use of a black circle helps to signify the location of the light, while the magenta line serves to indicate its significance in navigation, helping mariners identify safe navigation routes and potential hazards.

The other choices do not correspond to the accepted symbol for a lighthouse or fixed light, making them less suitable for navigation use. The consistent use of specific shapes and colors in navigational charts is crucial for mariners to maintain awareness and make informed decisions while at sea. Understanding these symbols enhances safety and efficiency in maritime operations.