Definition
A lubber line is a vertical line on a compass or other navigational instrument that indicates the direction of the vessel's bow or heading. Imagine a small mark on your car's dashboard that shows which direction you are currently facing. It's the reference point against which you read the compass heading. The lubber line is crucial for accurately determining your course and staying on track. It's a simple, yet essential, tool for navigation, especially on ships and boats. It's like the North Star for your vehicle.