What is the purpose of having Waypoints in navigation?

Waypoints play a crucial role in navigation as they serve primarily for route definition and progress reporting. These are predefined geographical locations that pilots use to navigate along their flight path. By using waypoints, pilots can effectively follow a designated route from departure to arrival by referring to these points.

Each waypoint has specific coordinates, making it easy for pilots to understand their location in relation to the intended route. Additionally, waypoints are often used in conjunction with air traffic control to help ensure that the aircraft remains on the correct flight path and to assist in reporting position to controllers. This systematic approach enhances both safety and efficiency in flight operations.

In contrast, the other options focus on aspects that are not the primary functions of waypoints. While aeronautical charts do incorporate waypoints, their main purpose is not to define those charts. Similarly, guiding during takeoff and indicating landing zones pertain to other navigational aids and procedures rather than the specific function of waypoints in route planning and progress tracking.