Features: Precisions Marine Grade Divider with Brass Construction delivers ≤0.1mm measurement accuracy for marine charting, featuring copper alloy legs and stable angles locking to withstand saltwater environments. Engineered with brass components and smooth rotation, this charting tool maintains structural integrity during vessel vibrations while enabling effortless distance calculation on maps. Essential for professional and yacht navigators requiring navigation instruments, particularly when coordinating with parallel rulers or sextants for precise course plotting. Optimized for measuring scales and distances across rolling decks, its rounded tips protect charts during frequent usage in commercial ships or recreational boating scenarios. The compact marine divider securely stores in navigation set, featuring slip resistant hinge tension and 5+ year durability a critical tool for converting chart data into actionable routes. Specifications: Component: Brass Size: about. 2x17x2cm/0.78x6.69x0.78in Package Includes: 1pc Navigation Divider note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.