The ruler’s transparent acrylic build provides excellent clarity, enabling users to overlay it on charts without obstructing important details. Its parallel alignment system simplifies complex measurements, making it a valuable tool for ship captains, sailors, and designers who require dependable performance in navigation and drafting tasks. Features - Color: Transparent -Material:Acrylic, stainless steel - Size: 60.00X7.50X0.50cm/23.58X2.95X0.20in -Exact measurements: provides precise chart plotting, improving navigation accuracy and safety -Easytouse design: pull mechanism facilitates simple operation, ideal for spaces and complex environments - material: endures severe marine conditions, prolonging usage and reducing the need for replacements -Consistent angles: parallel ruler design ensures steady measurement angles, boosting drawing efficiency -Special application: suitable for ocean voyages, , and marine studies, a musthave for seafaring professionals Package list: 1 x parallel ruler