What is the light color of the back course marker?

The back course marker is used in navigation, particularly in aviation and certain maritime contexts, and is typically denoted by a specific light color. The correct answer, white, is significant because it provides clear visibility and distinction in various environmental conditions. White light is commonly used in navigational aids to mark the back course, allowing pilots or navigators to identify their position and direction accurately.

The choice of white light helps create a universal standard, making it easily recognized by users at night and in low-visibility situations. This consistency is crucial for safety, as it ensures that all users can reliably interpret the signals regardless of location or weather conditions. Therefore, understanding that the color white designates the back course marker aligns with the broader principles of navigation and communication in both aviation and maritime environments.