To Chart A Course Sailors Use A Parallel Ruler
Navigation is an essential skill for sailors, and charting a course is a crucial part of that. A parallel ruler is a tool that sailors use to make accurate measurements and plot courses on nautical charts. It is a simple yet effective device that has been used for centuries, and it remains an essential tool for sailors today.
What is a parallel ruler?
A parallel ruler is a straightedge tool used for navigation. It consists of two straight edges joined by two arms that are hinged together. The arms can slide along the edges, allowing the ruler to be adjusted to any angle. The ruler is placed on a nautical chart, and the arms are used to draw a line parallel to a course or to measure the distance between two points.
How is a parallel ruler used?
To use a parallel ruler, the sailor lines up the ruler with the course they wish to follow on the nautical chart. The arms of the ruler are then adjusted to be parallel to the course. The sailor can then trace a line along the ruler, which will be parallel to the course. The ruler can also be used to measure the distance between two points on the chart by adjusting the arms to align with the two points and then measuring the distance between the edges of the ruler.
Why is a parallel ruler important?
A parallel ruler is an essential tool for sailors because it allows them to make accurate measurements and plot courses on nautical charts. Without a parallel ruler, it would be difficult to navigate accurately and safely. It is also a simple and reliable tool that does not require any batteries or electronics, making it ideal for use on boats where power sources may be limited.
Conclusion
A parallel ruler may seem like a simple tool, but it is an essential part of any sailor's navigation kit. By allowing sailors to make accurate measurements and plot courses on nautical charts, it helps them navigate safely and efficiently. Whether you are a seasoned sailor or just starting, a parallel ruler is an important tool that no sailor should be without.
