12 Inch Parallel Ruler Achieve precise navigation with our 12-inch parallel ruler, designed for plotting accurate bearings and course lines. This versatile tool combines the essential functions of a protractor and a parallel ruler, making it perfect for meridian measurement on boats and ships. Key Benefits: - Accurate Plotting: Easily plot lines of bearing and course degrees before charting, enhancing your navigation precision. - Durable Construction: Made from high-quality acrylic with a brushed aluminum arm and polished aluminum handle, this ruler is built to withstand frequent use over time. - Clear Scales: Features easy-to-read engraved 180° protractor markings. The center of the bottom edge aligns with the protractor center when arms are closed, ensuring accurate measurements. - High Transparency: Offers excellent transparency for unobstructed viewing of charts and maps, improving accuracy in mapping and drawing tasks. Specific Use Scenarios: - Marine Navigation: Ideal for sailors needing to plot courses and bearings on nautical charts with precision. - Educational Tool: Useful in classrooms for teaching geometry and navigation principles. - Field Applications: Perfect for professionals conducting field surveys or environmental assessments where accurate plotting is crucial. With the sturdy connector and appropriate tension, you can maintain parallel lines effortlessly, making your drawing process not only accurate but also enjoyable. This 12-inch parallel ruler is a reliable companion for anyone seeking enhanced navigation capabilities.