{"product_id":"parallel-rule-captain-fields-18-e2-80-b3","title":"Parallel Rule – Captain Fields 18″","description":"Weems and Plath plain parallel rule. Length 380mm.\u003cbr\u003e\u003cbr\u003eThe 18-inch (45.72cm) Aluminum Arms Parallel Rule feature aluminum arms that join two clear acrylic rulers inscribed with a protractor scale. An essential item in any proper navigation kit, these rules are used to plot direction on a nautical chart from any convenient meridian or compass rose. The two straight-edged rules are connected to maintain the same angle. By walking the rules across the chart and securely holding down the non-moving rule, you can effectively plot a course.\u003cbr\u003e\u003cul\u003e\n\u003cli\u003e18-inches (45.72cm) long\u003c\/li\u003e\n\u003cli\u003eProtractor scale\u003c\/li\u003e\n\u003cli\u003eSturdy clear acrylic with aluminum arms\u003c\/li\u003e\n\u003cli\u003eProtective plastic sleeve\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003eSKU: N518","brand":"Boat books Australia","offers":[{"title":"Default Title","offer_id":52958667997548,"sku":"N518","price":59.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0946\/1920\/5996\/files\/Weems-18inch-parallel-rule.jpg?v=1764850835","url":"https:\/\/www.boatbooks-aust.com.au\/products\/parallel-rule-captain-fields-18-e2-80-b3","provider":"Boat books Australia","version":"1.0","type":"link"}