{"product_id":"scientific-anglers-sonar-stillwater-sweep-parabolic-sink-3-5-3-fly-line","title":"Scientific Anglers Sonar Stillwater Sweep Parabolic Sink 3\/5\/3 Fly Line","description":"\u003cblockquote\u003e\n\u003ch3\u003e\u003cspan\u003eThe Scientific Anglers Sonar Stillwater Seamless Density Parabolic, commonly known as a Sweep line, uses three different densities to create a U-shaped profile through the water. Its Sink 3 \/ Sink 5 \/ Sink 3 construction allows you to search different depths during a single retrieve while maintaining good contact with your flies.\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/blockquote\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eParabolic or “Sweep” style sinking line\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSink 3 \/ Sink 5 \/ Sink 3 triple-density construction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCreates a U-shaped profile through the water\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned to search different depths during the retrieve\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSeamless Density technology provides smooth transitions between densities\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHelps reduce hinging and maintain contact with the flies\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e45 ft head length\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOverweighted by two line sizes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned for multiple flies and long leaders\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTextured hang markers at 10 ft and 20 ft from the tip\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAST Plus for improved shooting and durability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSA Line ID\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWelded loops\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e100 ft total length\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe defining feature of a Sweep line is the faster-sinking middle section. With the Sink 5 section dropping below the Sink 3 sections on either side, the line forms a U-shaped or parabolic profile underwater rather than sinking at one consistent rate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis allows your flies to search through different depths during the retrieve. The belly of the line fishes deeper, while the slower-sinking tip keeps the flies positioned above the deepest section of the line. It’s a useful way of covering fish that are holding at different levels without constantly changing lines.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Seamless Density construction smoothly blends the different sink rates together, reducing the hinging that can occur with abrupt changes in density. This helps maintain a more direct connection through the line and makes subtle takes easier to detect.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 45 ft head is two line sizes heavy, providing plenty of power for turning over long leaders and teams of flies. Textured hang markers at 10 and 20 feet also give you a tactile reference as your flies approach the boat.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWho is this for?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eStillwater trout anglers looking for a Sweep line to search multiple depths during the same retrieve. Particularly useful when fish are scattered through the water column or when you want your flies to follow a changing depth rather than travelling through the lake at one consistent level.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0520\/5793\/1958\/files\/ChatGPT_Image_Sep_21_2026_12_20_28_PM.png?v=1789957357\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Scientific Anglers","offers":[{"title":"6 Weight WF Fast Sinking","offer_id":49182946787553,"sku":"SSCIENTIFIC10406S","price":199.95,"currency_code":"AUD","in_stock":true},{"title":"7 Weight WF Fast Sinking","offer_id":49182946820321,"sku":"SSCIENTIFIC10407S","price":199.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0520\/5793\/1958\/files\/stillwater-seamless-density-parabolic.jpg?v=1789957154","url":"https:\/\/theflyfisher.com.au\/products\/scientific-anglers-sonar-stillwater-sweep-parabolic-sink-3-5-3-fly-line","provider":"The Flyfisher","version":"1.0","type":"link"}