Material: Plastic Size: 30cm Color: As shown 1. Large 300mm marine navigation triangle, a precise navigation and drawing tool suitable for nautical distance measurement and route planning, meeting the needs of professional sailors. 2. Constructed of highly transparent, wear-resistant material, with clear and precise markings and smooth edges that protect against damage to charts, enhancing drawing efficiency and user comfort. 3. Classic navigation triangle design with standard angles of 30°, 60°, and 90°, convenient for marine navigation training and engineering drawing applications. 4. A versatile navigation teaching tool widely used in shipboard training, marine surveying, military academies, and engineering design. 5. Large size with excellent visibility and accuracy, making it an ideal tool for mariners, students, and designers in nautical charting and field surveying. Package includes:1pcs Navigational triangle