What is defined as a 'waypoint' in navigation?

A waypoint is specifically defined as a predetermined geographical location that is utilized for navigation purposes. These locations serve as reference points in a navigational system, helping pilots and navigators to determine their position, plan routes, and enhance the accuracy of flight paths.

Waypoints can be defined using various geographic coordinates (latitude and longitude) and are often incorporated into flight plans. They facilitate the navigation process by providing a clear target for pilots to follow, whether through visual references on a map or as data entries in flight management systems.

The other options do not align with the definition of a waypoint. For example, a temporary stop for refueling is a point of service rather than a navigation reference, while a visual landmark is not strictly a designated location for routing. Lastly, calculating speed pertains to a method of navigation rather than identifying a specific location. Thus, defining waypoints in terms of geographical locations emphasizes their crucial role in navigation.