How to use a Captain Fields Pattern Parallel Rule

The Captain Fields Pattern Parallel Rule by Blundell Harling is a trusted drafting tool for mariners, students, or anyone who requires precision in plotting courses and setting angles. Crafted with both accuracy and durability in mind, this rule streamlines navigation with ease, making it ideal for both beginners and seasoned professionals.

NOTE: Our guides are intended as just that, a guide. Please seek professional instruction before attempting to use these tools yourself.

Getting started with the Captain Fields Pattern Parallel Rule

Step 1: Position the Rule

Begin by placing the rule flat on your chart or drawing. Ensure it’s aligned to the baseline you’ll use for reference, whether that’s a horizontal or vertical line on a nautical chart or a grid in technical drawings.

Step 2: Slide the Rule Parallelly

To transfer a line or angle, hold one side of the rule steady while you slide the other edge forward along the chart. This simple movement keeps the rule in perfect parallel alignment, allowing you to draw straight lines at consistent angles across your work surface.

Step 3: Plotting a Course

For navigational purposes, set your course by adjusting the rule’s angle relative to any fixed line (such as a meridian or compass rose). Slide the rule across the chart to transfer your course accurately to new locations without changing the angle – perfect for marine plotting.

Step 4: Check Your Accuracy

Once your lines are drawn, take a quick look to ensure alignment with your intended angle or course. The parallel rule’s precision design minimises any need for adjustment, making final checks a breeze.

Key benefits of this product

Precision and Reliability

Engineered for professional-grade accuracy, this rule maintains flawless parallelism as you move it across the page. Whether you’re working on a busy nautical chart or a complex technical drawing, you can trust its reliability.

Durable Construction

Manufactured by Blundell Harling, a name known for quality in precision instruments, the Captain Fields Pattern parallel rule is built to last. Made from durable materials, it’s designed to withstand regular use without compromising accuracy.

Ease of Use

The Captain Fields pattern is intuitive for any user, whether you’re a seasoned navigator or new to drafting. Its straightforward slide-and-align design makes it a practical tool in both fast-paced environments and detailed drafting work.

Why choose the Blundell Harling Captain Fields Pattern Parallel Rule?

With a history of quality craftsmanship, Blundell Harling delivers products you can trust. The Captain Fields Pattern parallel rule is made with the user in mind, blending ease of use with the high accuracy needed for technical and navigational work. Whether you’re charting a course or creating precise designs, this tool offers you both accuracy and efficiency in one streamlined package.

For anyone serious about navigation or technical drawing, the Captain Fields Pattern Parallel Rule is an indispensable addition to your collection. Get yours today!