Scientific Anglers SONAR Titan Big Water Taper Max Sink Fly Line

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The SONAR Titan Big Water Taper Max Sink is a beefy line built for beefy rods and large fish. This is the ultimate blue water line for tropical scenarios when targeting the largest fish in the ocean. The industry-first 100-lb core increases the durability of this line and ensures that you’re going to bend/break your hook before you break the line. The short head turns over large flies with ease and the 6” per second sink rate gets this line down quickly. This is truly the world’s strongest fast-sinking line for big game ever created.



AST Plus Slickness - SA has built a number of important features into this line. AST Plus Slickness allows anglers to quickly shoot line with friction-minimizing performance. A 100lb monofilament core is strong and supple for versatility and durability. This version of the SONAR Titan features a sink rate of 6+ inches per second and a shooting texture to help you cast those monstrous flies.



Blue Water, Large Fish - This is a serious line designed for series (and technical) fly rods. With sizes built to fit 11-15wt fly rods, this isn’t your everyday line. This is a line that’s ideal for the largest fish in the deepest water including tropical blue water conditions. Think Marlin, Sailfish, Giant Grouper, and more. SA says ‘this is a line for 15-weight rods and fish that weigh more than you do’.



Tropical/Warm - SA’s Tropi-Core Technology means that this line is built for tropical climates. The Titan Big Water Taper Max Sink works best in water temps and air temps that are warm or tropical and the fly line is designed for maximum performance in a tropical saltwater scenario. Due to its warm water design, this line will shrivel in cold weather or cold water.



Short, Powerful Head - This line comes in three different models, each with a 31’ head. The 500gr line is rated for 11-13wt rods, the 600gr line for 12-14wt rods, and the 700gr line for 13-15wt rods. These are incredibly heavy lines that are designed for quick-sinking performance and durability. These aren’t going to be the best ‘casting’ lines, but when partnered with the right fly rod they’re highly capable and undoubtedly the most durable line on the market.


More Info

Best for: Saltwater, Blue Water, Large Fish


Loops: None


Sinking/Floating: Fast Sinking


Other Resources

2020 Tropical Saltwater Fly Line Shootout & Buyer's Guide

Fly Line Temps: Tropical Vs. Coldwater

Freshwater Fly Line Shootout & Buyer's Guide



Line WeightLengthHead WeightHead LengthSink RateColorPrice 
WF450I/F105ft450gr33ft1.0 ipsConch Tan/Surf$99.95
WF500S105ft500gr31ftFull SinkingSurf/Black$99.95
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