Feature:1. Acrylic Construction: Crafted from high hardness acrylic, the chart drawing triangle ruler is built to last, offering exceptional durability and a long lifespan for all your navigation and drawing needs.2. Dependable Navigation Tool: This triangle ruler is designed as a dependable drawing tool, providing a convenient way to precisely mark distances. Its wearproof and fully adjustable design allows for quick, accurate single handed operating.3. Precise Engraved Scales: The triangle drafting ruler features engraved scales that are both precise and easy to read, making it an excellent accessory for both drawing and measuring tasks.4. High Transparency for Clear Visibility: With excellent transparency, the navigation parallel ruler ensures that it does not obscure important information, allowing for clear and unobstructed viewing during use.5. Effortless and Efficient Use: Engineered for ease of use, the ship drawing triangle ruler facilitates quick and efficient measurements, enhancing productivity and accuracy whether you're navigating or drafting technical plans.Specification:Item Type: Chart Drawing Triangle RulerMaterial: AcrylicMaximum Measuring Distance: Approx. 300mm / 11.81inFitment: Suitable for boats, yachts, and ships as a convenient tool for accurate distance marking.Package List:2 x Chart Drawing Triangle Ruler