{"product_id":"parallel-rule-captain-fields-500mm","title":"Parallel Rule – Captain Fields 500mm","description":"\u003ch2 data-start=\"0\" data-end=\"44\"\u003eParallel Rule — Captain Fields 500 mm\u003c\/h2\u003e\n\u003cp data-start=\"45\" data-end=\"116\"\u003e\u003cstrong data-start=\"45\" data-end=\"116\"\u003e📐 Precision Navigation • Professional-Grade • Built for Chart Work\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"118\" data-end=\"492\"\u003eThe \u003cstrong data-start=\"122\" data-end=\"161\"\u003eCaptain Fields 500 mm Parallel Rule\u003c\/strong\u003e is a \u003cstrong data-start=\"167\" data-end=\"200\"\u003eserious navigation instrument\u003c\/strong\u003e, designed for accurate, repeatable course plotting on paper charts. Trusted by skippers, navigators, and maritime students, this full-length parallel rule delivers the precision and stability required for traditional chart work—whether at sea, in the classroom, or at the chart table ashore.\u003c\/p\u003e\n\u003cp data-start=\"494\" data-end=\"659\"\u003eMade to professional standards by \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eCaptain Fields\u003c\/span\u003e\u003c\/span\u003e, it reflects the enduring value of manual navigation skills in an increasingly digital world.\u003c\/p\u003e\n\u003chr data-start=\"661\" data-end=\"664\"\u003e\n\u003ch2 data-start=\"666\" data-end=\"734\"\u003e🧭 Why the Captain Fields Parallel Rule Is a Navigation Essential\u003c\/h2\u003e\n\u003ch3 data-start=\"736\" data-end=\"785\"\u003e📏 Full 500 mm Length — Built for Real Charts\u003c\/h3\u003e\n\u003cul data-start=\"786\" data-end=\"1015\"\u003e\n\u003cli data-start=\"786\" data-end=\"870\"\u003e\n\u003cp data-start=\"788\" data-end=\"870\"\u003e\u003cstrong data-start=\"788\" data-end=\"813\"\u003e500 mm working length\u003c\/strong\u003e is ideal for standard and large-format nautical charts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"871\" data-end=\"952\"\u003e\n\u003cp data-start=\"873\" data-end=\"952\"\u003eAllows long, accurate transfers of bearings and courses without repositioning\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"953\" data-end=\"1015\"\u003e\n\u003cp data-start=\"955\" data-end=\"1015\"\u003ePerfect for coastal, offshore, and passage-planning charts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1017\" data-end=\"1081\"\u003eThis length strikes the sweet spot between control and coverage.\u003c\/p\u003e\n\u003chr data-start=\"1083\" data-end=\"1086\"\u003e\n\u003ch3 data-start=\"1088\" data-end=\"1119\"\u003e🔁 Accurate Parallel Motion\u003c\/h3\u003e\n\u003cul data-start=\"1120\" data-end=\"1349\"\u003e\n\u003cli data-start=\"1120\" data-end=\"1200\"\u003e\n\u003cp data-start=\"1122\" data-end=\"1200\"\u003eTwin-arm parallel linkage keeps edges \u003cstrong data-start=\"1160\" data-end=\"1198\"\u003eperfectly parallel during movement\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1201\" data-end=\"1274\"\u003e\n\u003cp data-start=\"1203\" data-end=\"1274\"\u003eEnables precise transfer of bearings from compass rose to course line\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1275\" data-end=\"1349\"\u003e\n\u003cp data-start=\"1277\" data-end=\"1349\"\u003eMaintains alignment across multiple moves—critical for safe navigation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1351\" data-end=\"1442\"\u003eThis is the core advantage of a well-made parallel rule: confidence in every line you draw.\u003c\/p\u003e\n\u003chr data-start=\"1444\" data-end=\"1447\"\u003e\n\u003ch3 data-start=\"1449\" data-end=\"1491\"\u003e📐 Clear Graduations \u0026amp; High Visibility\u003c\/h3\u003e\n\u003cul data-start=\"1492\" data-end=\"1698\"\u003e\n\u003cli data-start=\"1492\" data-end=\"1570\"\u003e\n\u003cp data-start=\"1494\" data-end=\"1570\"\u003e\u003cstrong data-start=\"1494\" data-end=\"1525\"\u003eBold, easy-to-read markings\u003c\/strong\u003e assist with course drawing and measurement\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1571\" data-end=\"1649\"\u003e\n\u003cp data-start=\"1573\" data-end=\"1649\"\u003eTransparent construction allows full visibility of chart detail underneath\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1650\" data-end=\"1698\"\u003e\n\u003cp data-start=\"1652\" data-end=\"1698\"\u003eReduces parallax error and improves accuracy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1700\" data-end=\"1751\"\u003eEvery design choice supports clarity and precision.\u003c\/p\u003e\n\u003chr data-start=\"1753\" data-end=\"1756\"\u003e\n\u003ch3 data-start=\"1758\" data-end=\"1800\"\u003e🛠️ Durable, Professional Construction\u003c\/h3\u003e\n\u003cul data-start=\"1801\" data-end=\"1987\"\u003e\n\u003cli data-start=\"1801\" data-end=\"1881\"\u003e\n\u003cp data-start=\"1803\" data-end=\"1881\"\u003eManufactured from \u003cstrong data-start=\"1821\" data-end=\"1852\"\u003ehigh-quality, clear acrylic\u003c\/strong\u003e for strength and longevity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1882\" data-end=\"1927\"\u003e\n\u003cp data-start=\"1884\" data-end=\"1927\"\u003eRigid enough to resist flexing during use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1928\" data-end=\"1987\"\u003e\n\u003cp data-start=\"1930\" data-end=\"1987\"\u003eSmooth edges glide cleanly over charts without snagging\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1989\" data-end=\"2057\"\u003eDesigned for repeated daily use in marine and training environments.\u003c\/p\u003e\n\u003chr data-start=\"2059\" data-end=\"2062\"\u003e\n\u003ch2 data-start=\"2064\" data-end=\"2110\"\u003e⚓ Designed for Traditional Chart Navigation\u003c\/h2\u003e\n\u003cp data-start=\"2111\" data-end=\"2199\"\u003eWhile electronics dominate modern navigation, \u003cstrong data-start=\"2157\" data-end=\"2194\"\u003eparallel rules remain fundamental\u003c\/strong\u003e for:\u003c\/p\u003e\n\u003cul data-start=\"2200\" data-end=\"2349\"\u003e\n\u003cli data-start=\"2200\" data-end=\"2234\"\u003e\n\u003cp data-start=\"2202\" data-end=\"2234\"\u003eTeaching navigation principles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2235\" data-end=\"2272\"\u003e\n\u003cp data-start=\"2237\" data-end=\"2272\"\u003eCross-checking electronic courses\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2273\" data-end=\"2310\"\u003e\n\u003cp data-start=\"2275\" data-end=\"2310\"\u003ePassage planning and logbook work\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2311\" data-end=\"2349\"\u003e\n\u003cp data-start=\"2313\" data-end=\"2349\"\u003eMaintaining core seamanship skills\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2351\" data-end=\"2386\"\u003eThis tool keeps those skills sharp.\u003c\/p\u003e\n\u003chr data-start=\"2388\" data-end=\"2391\"\u003e\n\u003ch2 data-start=\"2393\" data-end=\"2413\"\u003e📐 Specifications\u003c\/h2\u003e\n\u003cul data-start=\"2414\" data-end=\"2650\"\u003e\n\u003cli data-start=\"2414\" data-end=\"2439\"\u003e\n\u003cp data-start=\"2416\" data-end=\"2439\"\u003e📏 \u003cstrong data-start=\"2419\" data-end=\"2430\"\u003eLength:\u003c\/strong\u003e 500 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2440\" data-end=\"2479\"\u003e\n\u003cp data-start=\"2442\" data-end=\"2479\"\u003e📐 \u003cstrong data-start=\"2445\" data-end=\"2454\"\u003eType:\u003c\/strong\u003e Twin-arm parallel rule\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2480\" data-end=\"2547\"\u003e\n\u003cp data-start=\"2482\" data-end=\"2547\"\u003e🧭 \u003cstrong data-start=\"2485\" data-end=\"2493\"\u003eUse:\u003c\/strong\u003e Course plotting, bearing transfer, chart navigation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2548\" data-end=\"2583\"\u003e\n\u003cp data-start=\"2550\" data-end=\"2583\"\u003e🛠️ \u003cstrong data-start=\"2554\" data-end=\"2567\"\u003eMaterial:\u003c\/strong\u003e Clear acrylic\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2584\" data-end=\"2650\"\u003e\n\u003cp data-start=\"2586\" data-end=\"2650\"\u003e⚓ \u003cstrong data-start=\"2588\" data-end=\"2604\"\u003eApplication:\u003c\/strong\u003e Nautical charts, training, professional use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2652\" data-end=\"2655\"\u003e\n\u003ch2 data-start=\"2657\" data-end=\"2678\"\u003e🎯 Who This Is For\u003c\/h2\u003e\n\u003cul data-start=\"2679\" data-end=\"3057\"\u003e\n\u003cli data-start=\"2679\" data-end=\"2756\"\u003e\n\u003cp data-start=\"2681\" data-end=\"2756\"\u003e\u003cstrong data-start=\"2681\" data-end=\"2705\"\u003e⚓ Skippers \u0026amp; sailors\u003c\/strong\u003e — accurate manual plotting and backup navigation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2757\" data-end=\"2833\"\u003e\n\u003cp data-start=\"2759\" data-end=\"2833\"\u003e\u003cstrong data-start=\"2759\" data-end=\"2799\"\u003e🧭 Navigation students \u0026amp; instructors\u003c\/strong\u003e — essential classroom equipment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2834\" data-end=\"2905\"\u003e\n\u003cp data-start=\"2836\" data-end=\"2905\"\u003e\u003cstrong data-start=\"2836\" data-end=\"2877\"\u003e🚢 Commercial \u0026amp; professional mariners\u003c\/strong\u003e — chart table reliability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2906\" data-end=\"2983\"\u003e\n\u003cp data-start=\"2908\" data-end=\"2983\"\u003e\u003cstrong data-start=\"2908\" data-end=\"2938\"\u003e🗺️ Traditional navigators\u003c\/strong\u003e — those who value precision and discipline\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2984\" data-end=\"3057\"\u003e\n\u003cp data-start=\"2986\" data-end=\"3057\"\u003e\u003cstrong data-start=\"2986\" data-end=\"3013\"\u003e🎁 Maritime gift buyers\u003c\/strong\u003e — a practical, meaningful navigation tool\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3059\" data-end=\"3062\"\u003e\n\u003ch2 data-start=\"3064\" data-end=\"3095\"\u003e⭐ Why Choose Captain Fields?\u003c\/h2\u003e\n\u003cp data-start=\"3096\" data-end=\"3319\"\u003eCaptain Fields instruments are known for \u003cstrong data-start=\"3137\" data-end=\"3183\"\u003epractical design, accuracy, and durability\u003c\/strong\u003e. Their tools are made to be used—not displayed—and have earned a reputation for reliability in both training and real-world navigation.\u003c\/p\u003e\n\u003cp data-start=\"3321\" data-end=\"3399\"\u003eThe 500 mm Parallel Rule is no exception: \u003cstrong data-start=\"3363\" data-end=\"3398\"\u003esimple, precise, and dependable\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"3401\" data-end=\"3404\"\u003e\n\u003ch3 data-start=\"3406\" data-end=\"3441\"\u003ePlot with confidence—every time\u003c\/h3\u003e\n\u003cp data-start=\"3442\" data-end=\"3649\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eAdd the \u003cstrong data-start=\"3450\" data-end=\"3489\"\u003eCaptain Fields 500 mm Parallel Rule\u003c\/strong\u003e to your chart kit and enjoy the assurance that comes with precise, traditional navigation.\u003cbr data-start=\"3580\" data-end=\"3583\"\u003e\u003cstrong data-start=\"3583\" data-end=\"3649\" data-is-last-node=\"\"\u003eAdd to cart and keep your chart work accurate and disciplined.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Mapworld","offers":[{"title":"Default Title","offer_id":47215466184896,"sku":null,"price":169.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0071\/5032\/files\/parallel-rule-500mm-e1746586920374.webp?v=1767782847","url":"https:\/\/www.mapworld.com.au\/products\/parallel-rule-captain-fields-500mm","provider":"Mapworld","version":"1.0","type":"link"}