Scientific Anglers Sonar Saltwater Intermediate Full Clear
In Stock • Bozeman, MT
- Slow sink rate gets flies just below the surface
- Engineered for use in salt water
- Clear for stealthy presentations
- Tropi-Core technology for tropical climates
- Sink Rate: 1.25 ips (Intermediate)
Description
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.
Features
• Full-Intermediate Design — The entire line, not just the tip, sinks slowly at 1.25 ips for a stealthy, subsurface presentation.
• Full Clear — Updated 2026 construction for maximum stealth on wary, skittish flats fish.
• Compact 38-41ft Head — A less aggressive taper than SA's Titan lines, tuned for modern fast-action rods.
• Tropi-Core Technology — Stays stiff and slick in hot, tropical conditions instead of going soft or sticky.
• AST Slickness Additive — Built into the coating for lasting reduced friction and longer, easier casts.
• SA Line ID — Printed weight and taper marking directly on the line.
• Welded Loops, Front and Rear — Fast, secure connections to backing and leader.
Rod Pairing
| Rod Action | Pairing | Notes |
|---|---|---|
| Fast Action | Ideal | A less aggressive taper than SA's Titan lines -- built specifically for modern fast-action blanks. |
| Medium-Fast Action | Works Well | Loads cleanly; can begin to fall apart when carrying a lot of line. |
| Medium Action | Not Recommended | The short head is tuned for a crisper, faster stroke than a soft blank delivers. |
Size Guide
| Line Weight | Head Length | Head Weight | Grain Wt (30') | Species / Technique |
|---|---|---|---|---|
| WF7 | 38.0' / 11.6M | 215gr / 13.9g | 200gr / 13.0g | Light bonefish, redfish |
| WF8 | 38.0' / 11.6M | 265gr / 17.2g | 225gr / 14.6g | Bonefish, permit, snook, juvenile tarpon |
| WF9 | 38.0' / 11.6M | 330gr / 21.3g | 260gr / 16.9g | Permit, snook, redfish, juvenile tarpon |
| WF10 | 41.0' / 12.5M | 415gr / 26.8g | 305gr / 19.8g | Redfish, striper, medium tarpon |
| WF11 | 41.0' / 12.5M | 510gr / 33.0g | 355gr / 23.0g | Large tarpon, striper |
| WF12 | 41.0' / 12.5M | 620gr / 40.2g | 415gr / 26.9g | Giant tarpon |
FAQ
What are the parts of a fly line and what does each section do?
A weight-forward fly line has five sections: Running Line: The thin, level back section that shoots through guides -- unusually, on this line the running line itself sinks slowly along with the head, rather than floating. Rear Taper: The transition from running line to belly. Belly (Head): The thickest section, 38 to 41 feet depending on size, built with a less aggressive taper than SA's Titan lines for smooth loading on modern fast-action rods. Front Taper: The transition from belly to tip. Tip: The final section where the leader connects, finished with a welded loop for a fast, secure connection. Because the entire line -- not just a short tip section -- sinks at 1.25 inches per second, this is a true full-intermediate line rather than a floating line with a sinking tip.
What is AST and how does it affect performance?
AST -- Advanced Shooting Technology -- is Scientific Anglers' original slickness additive, mixed directly into the line's coating rather than applied as a surface treatment. Because it's built into the coating itself, it lasts as long as the line does rather than wearing off, and it also helps repel the dirt and grime that build up on a boat deck or beach. In practice, that means less friction through the guides for longer, easier casts over a full day.
What is Tropi-Core and why does it matter for saltwater flats fishing?
Tropi-Core is Scientific Anglers' core technology built specifically for tropical and warm-water climates. A standard fly line core can go soft, sticky, or lose structure on a hot boat deck or under direct tropical sun; Tropi-Core is designed to stay stiff and slick in those conditions instead, so the line keeps casting well on the hottest, brightest days of a flats trip rather than breaking down by the afternoon.
Why does the entire line sink instead of just the tip, and what does that mean on the water?
Most stealth-focused saltwater lines use a floating running line with only a short clear tip sinking, keeping line control easy. This line takes a different approach, sinking the full length at a slow 1.25 ips so the connection between fly and rod stays just under the surface glare rather than sitting on top of it -- useful for fish that are wary of any surface disturbance or wake from a floating line. The tradeoff is that mending and picking up line for a quick recast takes a bit more effort than with a floating-running-line design, since there's no floating section to lift cleanly off the water.
How does this compare to the RIO Elite Flats Pro Intermediate?
Both are dedicated full-intermediate saltwater tapers where the entire line sinks slowly rather than just a clear tip, but they cover different weight ranges and taper designs. This SA Sonar Saltwater Intermediate runs WF7-WF12 on a compact 38-41 foot head, tuned for modern fast-action rods with a less aggressive taper than SA's Titan series. The RIO Elite Flats Pro Intermediate is built on RIO's longer, approximately 48-foot DirectCore head and is offered at the heavier end of the range (WF8I-WF12I), designed more around line control and casting accuracy at distance. Choose the SA Sonar Saltwater Intermediate for a wider weight range including a lighter WF7 option and a taper built specifically for fast-action blanks. Choose the RIO Flats Pro Intermediate for its longer head and RIO's SlickCast coating if extended-range accuracy is the priority.
