Portland Rib Plotter

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The Portland Rib Plotter provides precise, reliable course plotting for both coastal navigation and land-based map work. Designed for clarity and ease of use, it is an essential to ol for students, skippers, and professional navigators. Can be used on marine charts and land maps for versatile navigation planning Measures against the coastline rather than offshore, improving coastal route accuracy Central compass-rose style marking supports quick course and bearing checks 1:500,000 scale in kilometres for straightforward distance measurement on standard charts Durable, easy-to-read markings designed for frequent chart table use Add this plotter to your navigation kit for consistent, professional-standard chart work. Show more