Scientific Anglers Sonar Series Fly Lines

The Sonar series was designed by anglers for anglers. Built for exploring every inch of the water column, the Sonar series features sinking heads, full-sinking lines, and even custom-cut lines for getting down as deep as you need.

Constructed with our AST slickness additive, Sonar sinking technology, SA ID line identification system and welded loops, the Sonar series is a technologically advanced set of sinking lines for fish of all species.

Fresh or salt water, it doesn't matter. We have a Sonar line for the fish you're after.

Sonar Sink 25 Cold

Sinking-head fly line for cold water

When it comes to fishing streamers in cold water, it’s difficult to beat the SONAR Sink 25. Designed with a short 25' fast-sinking head, the Sink 25 sinking fly line gets flies deep extremely quickly and is paired with a large diameter handling section for excellent line control. When it’s time to get down and dirty, the Sink 25 has your back.

25' extra-fast sinking head with handling line
For coldwater applications
An excellent streamer line for trout
Low-tangle design increases shooting distance
Floating running line
Super-fast sink: 4.0 - 8.0 ips, sinks 4' - 15'
Braided multifilament core
SA ID - SA SONAR SINK 25 ### (# = grain weight)

Line weight	Head length	Total length	Grain weight
5 - 6	25.0'	105.0'	150
6 - 7	25.0'	105.0'	200
7 - 8	25.0'	105.0'	250
8 - 9	25.0'	105.0'	300
9 - 10	25.0'	105.0'	350
11 - 12	25.0'	105.0'	400
12 - 13	25.0'	105.0'	450

Sonar Sink 30 Clear

Intermediate sinking fly line for warm water

So part of the equation is getting flies in front of fish. The next part is not spooking them while doing so. Our SONAR Sink 30 Clear fly line offers the same casting benefits of the SONAR Sink 30 taper, but substitutes a 30' slow-sinking clear head. When stealth isn’t an option, the best choice is to go clear.

30' clear sinking head to get flies just below the surface
Intermediate running line
Sink rate: Intermediate = 1.25 ips'
Braided multifilament core
SA ID - SA SONAR SINK 30 ### (# = grain weight)

Line weight	Head length	Total length	Grain weight
6 - 7	30.0'	105.0'	200
7 - 8	30.0'	105.0'	250
8 - 9	30.0'	105.0'	300
9 - 10	30.0'	105.0'	350
11 - 12	30.0'	105.0'	400

Sonar Grand Slam Clear Tip

Bonefish, permit and tarpon, all on one line

Tarpon. Bonefish. Permit. All in one day. All on one line. That’s the idea behind the Mastery Grand Slam, a fly line designed specifically to help you achieve one of angling’s most elusive accomplishments. We’ve taken our most popular saltwater taper and added a clear intermediate tip for ultra wary fish.

8 foot clear, intermediate sink tip for ultra wary fish
Intermediate tip gets the fly down to fish
Overweighted by .75 sizes to load rods quickly; use designated line weight for your rod
Short, powerful head turns over long leaders and heavy flies
Tropi-Core technology remains stiff and slick in tropical environments
Sink Rate: 1.25 ips (Intermediate)
SA ID - SA SONAR GS CLEAR TP WF XX FI (X= line weight)

Line weight	Head length	Total length	Grain weight
WF6FI	40.0'	100.0'	175
WF7FI	40.0'	100.0'	205
WF8FI	40.0'	100.0'	235
WF9FI	40.0'	100.0'	270
WF10FI	40.0'	100.0'	320
WF11FI	40.0'	100.0'	365
WF12FI	40.0'	100.0'	435

Sonar Saltwater Intermediate

Slow-sinking fly line for saltwater

It’s not very often you’ll need to fish topwater flies in the salt. That’s where an intermediate line comes in handy. The SONAR Saltwater Intermediate fly line features a slow-sinking clear head that cuts through the surface and provides an amazing amount of stealth for those wary fish cruising the flats. From redfish and bonefish to permit and tarpon, give yourself an edge that fish won’t be able to see.

Slow sink rate gets flies just below the surface
Engineered for use in saltwater
Clear head for stealthy presentations
Built a half-size heavy for quick loading
Intermediate running line
Tropi-Core technology for tropical climates
Sink rate: 1.25 ips
SA ID - SA SONAR SWTI WF X I (X = line weight)

Line weight	Head length	Total length	Grain weight
WF7I	38.0'	105.0'	200
WF8I	38.0'	105.0'	225
WF9I	38.0'	105.0'	260
WF10I	41.0'	105.0'	305
WF11I	41.0'	105.0'	355
WF12I	41.0'	105.0'	415

Sonar Musky

Powerful, fast-sinking musky taper

For casting large, bulky flies and getting them deep in the water column.

Powerful head to turn over extremely large flies
Reinforced loops
Oversized running line for increased line management and positive strip sets
Intermediate running line and Sink 5 head works well for lakes and rivers
For use in moderate climates
Braided multifilament core
SA ID - SA SONAR MUSKY XXXGR (XXX = grain weight)

Line weight	Head length	Total length	Grain weight
10-11	30.0'	90.0'	450
11-12	30.0'	90.0'	500

Sonar Surf

Ideal surf line for single- and double-hand rods

Cast out and get down with the Sonar Surf. Designed with a 27’ Sink 6 head the Sonar Surf is THE ideal line for single and double hand rods in the surf.

27’ Sink 6 head designed for use with single hand and double hand rods
Intermediate running line with integrated handling section
Sink Rate: Sink 6: 5.5 – 6.5 ips
For use in moderate climates
Braided multifilament core
SA ID - SA SONAR SURF XXXGR (XXX = grain weight)

Line weight	Head length	Total length	Grain weight
7-8	27.0'	105.0'	200
8-9	27.0'	105.0'	250
9-10	27.0'	105.0'	300

Sonar 3D Custom Tip

Custom-cut sinking fly line

Fly anglers are nothing if not inventive. From splicing together lines to weighing coils on a digital scale, finding the perfect sinking line can be a chore. The SONAR Custom Tip sinking fly line makes all of that much, much easier. This cut-to-fit fly line allows you to slice off as much line as you need to fit everything from a 7-weight through a 15-weight.

Cut-to-fit design lets you cut the tip to the ideal weight
Goes deep and stays deep
Intermediate running line; fast-sinking head
Sink rates:
- Intermediate = 1.25 ips
- Sink 3 = 2.5-5.5 ips
- Sink 8 = 8 ips
Braided multifilament core
Comes with braided add-on loop

Line weight	Head length	Total length	Grain weight
Cut-to-fit	35.0'	105.0'	462

Sonar Jungle Custom Tip

Custom-cut sinking fly line for jungle fish

Fly anglers are nothing if not inventive. From splicing together lines to weighing coils on a digital scale, finding the perfect sinking line can be a chore. The SONAR Jungle Custom Tip sinking fly line makes all of that much, much easier. This cut-to-fit fly line allows you to slice off as much line as you need to fit everything from a 7-weight through a 15-weight for chasing peacock bass, golden dorado, and other jungle species.

Cut-to-fit design lets you cut the tip to the ideal weight for whichever species you’re chasing
Excellent custom sinking line for species such as peacock bass and dorado in harsh jungle environments
Goes deep and stays deep
Intermediate running line; fast-sinking head Sink Rate: 7.75 ips
Tropi-Core technology remains stiff and slick in tropical environments
Comes with braided add-on loop

Line weight	Head length	Total length	Grain weight
Cut-to-fit	35.0'	105.0'	462

Sonar Tropical Custom Tip

Custom-cut sinking fly line for tropical climates

Fly anglers are nothing if not inventive. From splicing together lines to weighing coils on a digital scale, finding the perfect sinking line can be a chore. The SONAR Tropical Custom Tip sinking fly line makes all of that much, much easier. This cut-to-fit fly line allows you to slice off as much line as you need to fit everything from a 7-weight through a 15-weight.

Cut-to-fit design lets you cut the tip to the ideal weight
Goes deep and stays deep
Intermediate running line
Sink rate: 7.75 ips
Tropi-Core technology for tropical climates
Comes with braided add-on loop

Line weight	Head length	Total length	Grain weight
Cut-to-fit	35.0'	105.0'	462

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