12 Inch Parallel Ruler - Accurate Navigation: This 12-inch parallel ruler is designed for plotting precise bearings and course lines, perfect for navigators and mariners. Easily measure angles and alignments for effective charting, making it indispensable for any nautical environment. - Durable Construction: Crafted from high-quality acrylic with a brushed aluminum arm and polished aluminum handle, this parallel ruler is built to withstand the rigors of regular use. Its robust materials ensure longevity and reliability over time, giving you confidence in your tools. - Precision Measurement: The ruler features clear, easy-to-read scales with full 180° protractor markings. When the arms are closed, the bottom edge serves as a protractor center, combining essential functionality in a compact design. - Enhanced Visibility: Its high transparency allows for unobstructed viewing of charts and information, significantly improving accuracy during mapping and drawing tasks. - User-Friendly Operation: Simply hold the parallel ruler in each hand and move it alternately, thanks to a sturdy connector that provides appropriate tension. This ensures a smooth and enjoyable drawing process while maintaining precision. Applications: 1. Navigate your vessel with confidence by accurately plotting routes and bearings for safe travel on water. 2. Incorporate the ruler in maritime training programs to help students learn essential navigation skills effectively. 3. Utilize it for cartography and topographic mapping tasks, where precise angle measurements are crucial.