what does it mean when something is heading due west?

It is going straight west.

When something is heading due west, it means it is moving directly towards the west, or in other words, it is following a path that is exactly perpendicular to the north-south axis. This direction is measured and expressed based on cardinal directions, with west being opposite to east.

To understand the concept of due west, you can use several methods to determine the direction. Here are a few examples:

1. Compass: A compass is a tool that helps determine directions with respect to magnetic north. By aligning the needle with the north-south axis, the westward direction can be easily identified.

2. Sun: If you are in the Northern Hemisphere, you can use the sun as a reference point. In the morning, the sun rises in the east and moves westward throughout the day. If you face the sun directly, approximating 180 degrees to your left will indicate due west.

3. Maps: Maps often have cardinal directions marked on them, allowing you to determine due west by following the designated lines.

4. Landmarks: Familiar landmarks, such as mountain ranges or coastlines, can provide a general sense of direction. By knowing the location of these landmarks and using them as reference points, you can determine the direction of due west.

By utilizing these methods, you can identify if something is heading due west or recognize the direction yourself.