What does the lubber's line indicate?

The lubber's line is a critical feature found on navigational instruments such as compasses and radar displays. It serves as a reference line that indicates the direction of the ship's bow, which is the front part of the vessel. When the ship is moving, the lubber's line helps the navigator determine the heading or course the ship is currently on.

By aligning the lubber's line with the compass or geographical direction, navigators can easily see where the ship is pointed. This information is essential for safe navigation and helps in maintaining a steady course, especially when adjusting for wind and current conditions. Thus, understanding the lubber's line and its function is crucial for those involved in maritime navigation.