In navigation, what does “true course” refer to?

"True course" refers specifically to the angle from true north to the intended route of a flight or navigational path. This angle is measured in degrees and is essential for ensuring that the aircraft is on the correct heading to reach its destination. It takes into account the Earth's curvature and the geographic layout of the terrain, making it fundamental for precise navigation using maps and charts.

The concept of true course is distinct from other navigational terms. For instance, while the distance between two navigation points is relevant for planning a flight, it does not define the path itself. Similarly, magnetic variation is related to the difference between magnetic north and true north, which can affect how the true course is applied in real-world navigation, but it is not the definition of true course itself. Lastly, altitude concerns safe vertical navigation and has no bearing on the directional aspect denoted by true course.