{"product_id":"one-arm-protractor-for-navigations-charts","title":"One-Arm Protractor for Navigations Charts","description":"ONE-ARM PROTRACTOR: This protractor features a rotating arm, a compass rose with cardinal directions (N, S, E, W) and intermediate points, and a degree scale (0 to 360) for aligning with the meridian on the chart.\u003cbr\u003e\u003cbr\u003eTRANSPARENT BASE: Made of transparent plastic to allow visibility of the chart details beneath it. The clear center mark helps position the protractor precisely on a specific point or location on the chart.\u003cbr\u003e\u003cbr\u003eTWO SCALE RATIOS FOR SPECIFIC NEEDS: The scale ratio of 1:200,000 is suitable for larger areas, while the scale ratio of 1:50,000 is ideal for more detailed mapping. With a total length of 17 1\/2 inches, this protractor is well-suited for working with larger charts and maps.\u003cbr\u003e\u003cbr\u003eINDEX LINE AND BEARING ARM: The protractor includes a central pivot point, an index line for alignment, and a bearing arm for plotting courses and measuring bearings directly.\u003cbr\u003e\u003cbr\u003eAPPLICATION: This protractor is used for plotting courses and measuring bearings on nautical charts. It is specifically designed for maritime navigation purposes and has a single rotating arm.\u003cbr\u003e\u003cbr\u003ePRODUCT NUMBER: FO-1415","brand":"Five Oceans","offers":[{"title":"Default Title","offer_id":46076704194695,"sku":"bni1791444497327","price":16.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0656\/9171\/3671\/files\/one-arm-protractor-for-navigations-charts_1.jpg?v=1791444525","url":"https:\/\/www.venqelo.com\/products\/one-arm-protractor-for-navigations-charts","provider":"Cirevique","version":"1.0","type":"link"}