What is the purpose of the course line on a ship?

The course line on a ship serves the purpose of showing the direction of the ship's movement. It is an important navigational indicator, representing the intended path the vessel is following over the surface of the water.

This line is typically plotted on navigational charts or electronic displays, allowing the crew to visualize the course relative to land, navigational aids, and other important features. By maintaining awareness of the course line, the crew can ensure that they are steering in the correct direction to reach their destination safely and efficiently.

While it’s true that other aspects of navigation, like location and speed, are crucial for overall situational awareness, the primary function of the course line is to provide a clear indication of the ship's intended heading. Knowing this helps the crew make necessary adjustments to their navigation in response to environmental factors, obstacles, or changes in mission requirements.