- Enhances your navigation skills with an expertly crafted instrument built to withstand the rigors of sea travel, while providing clear scale markings for easy use. - Designed for professionals, captains, enthusiasts, and maritime students who need a reliable navigation tool for chart work and plot accuracy. - Precise marine navigation with a parallel ruler for marine navigation, featuring a solid arm that ensures durability during repeated use. - Size and stability: a 17 inch parallel ruler that delivers stability and accuracy when measuring distances and angles on the chart. - Key benefits: clear scale markings for quick readings, durable construction, and dependable performance in marine environments. - Practical use scenarios: - On deck during voyage planning to plot courses and measure bearings on the chart. - In training settings to practice chart work and navigational plotting. - During routine navigational checks to verify distances and angles against chart data. - Compatibility and performance notes: designed for chart-based navigation with emphasis on function, reliability, and long-term use at sea.