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. necessary for professional and yacht navigators requiring navigation instruments, particularly when coordinating with parallel rulers or sextants for 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.