Nautical Parallel Ruler 450mm Marine Navigation Parallel Ruler High Transparency Acrylic Nautical Sea Chart Plotting Tool 450mm Marine Navigation Parallel Ruler High Transparency Acrylic Nautical Sea Chart Plotting Tool Feature: 1. Acrylic Material: The parallel ruler is crafted from a high hardness acrylic plate for exceptional durability, ensuring it won't easily break or crack over extended use, thus offering a long use life. 2. Marine Plotting Tool: Provides a convenient way to accurately mark distances; it's fully adjustable and easy to use for fast, precise one handed operating, a great tool to supplement your navigation kit. 3. Clear Scale: Its engraved scale is precise and easily visible, making it an invaluable accessory for accurate plotting and surveying during navigation at sea. 4. High Transparency: Featuring excellent transparency, the navigation parallel scale does not obscure too much information, allowing for clear visibility and effective use. 5. Easy to Draw: Hold a ruler in each hand and move it alternately in parallel. Sturdy links provide the right tension for drawing a line parallel to another line or reference point. Specification: Item Type: Parallel Ruler Material: Acrylic Maximum Measuring Distance: Approx. 450mm / 17.72in Usage: Suitable for ships, yachts, boats mapping tools, providing a convenient way to accurately mark distances Package List: 1 xMarineParallelRuler _x000D_ _x000D_