Key benefits - Enhances navigation skills with an instrument expertly crafted to withstand the rigors of sea conditions while providing a clear, easy-to-use benchmark. - Perfect for charting, route planning, and maritime navigation training; an essential tool for any serious sailor. - Delivers precise sea navigation with the parallel ruler and a solid arm designed for durability. - Suitable for professionals, captains, enthusiasts, and maritime students seeking a reliable navigation instrument. Specifications and use - Function: parallel ruler instrument for marine navigation, supporting chart work, route planning, and navigation training. - Durability: solid arm designed for long-term reliability in demanding maritime environments. - Performance: enables precise, clear navigation and plotting to improve confidence during operations. - Audience: designed for professionals, captains, enthusiasts, and maritime students seeking a dependable navigation instrument. Use scenarios - Chart room planning: use the parallel ruler to plot a voyage across multiple waypoints, align lines with course bearings, and verify routes before departure. - On-deck navigation: during watch, quickly draw intercepts, adjust bearings, and confirm position by aligning ruler lines with chart references. - Maritime education and training: students practice plotting, measuring courses, and comparing instrument readings to reinforce navigation fundamentals.