Scientific Anglers Sonar Stillwater Intermediate Fly Line - 05 is backordered and will ship as soon as it is back in stock.
Description
Description
A Steady Sink for the Top of the Column
The Scientific Anglers Sonar Stillwater Intermediate Fly Line is a steady 1.7 ips line for searching the top few feet of the water column. It sinks slowly and evenly, keeping flies riding just below the surface on a consistent track so you can cover water with control. Reach for it when a moderate, even descent is what the fish want.
Scientific Anglers Sonar Stillwater Intermediate Key Features
- Steady 1.7 ips sink rate keeps flies riding just below the surface
- Overweighted by two line sizes for turning over long leaders and multiple flies
- 10-foot and 20-foot textured hang markers for precise depth counting and lift control
- Light Grey / Olive Drab colour scheme
Best Used For
- Stillwater fishing in the top few feet where a slow, even descent matters
- Covering water on a consistent track with flies just below the surface
- Long leaders and multi-fly rigs when the fish want a moderate sink
Technologies
- AST Plus – Advanced slickness additive that reduces friction, improves shootability and keeps the line performing longer.
- Welded Loops – Durable welded loops front and back for easy reliable loop-to-loop connections to backing and leaders.
- SA-ID – Printed line identification showing taper, weight and density for quick recognition.
- Sonar – Density-tuned sinking technology that delivers a smooth stable sink profile and consistent depth control through the retrieve.
- Audible Reference Point (ARP) – Textured band that produces a feelable, audible click through the guides, marking the ideal overhang point for loading the cast.
- Braided Multifilament Core – Supple cold-water core that improves flotation, reduces memory and provides smooth stable casting.
Temperature Rating
- Cold / Moderate – 0°C to 25°C
Target Species
- Trout
- Yellowfish
- Bass
- Barbel
- Carp
Types of Flies
- Nymphs
- Streamers
- Woolly Buggers
- Stillwater Patterns
Line Chart
| Line Weight | Head Length | Total Length | Head Weight | Grain Weight* |
|---|---|---|---|---|
| WF-5-I | 13.7 m | 30.5 m | 280 gr / 18.1 g | 185 gr / 12.0 g |
| WF-6-I | 13.7 m | 30.5 m | 320 gr / 20.7 g | 210 gr / 13.6 g |
| WF-7-I | 13.7 m | 30.5 m | 365 gr / 23.7 g | 240 gr / 15.6 g |
| WF-8-I | 13.7 m | 30.5 m | 425 gr / 27.5 g | 280 gr / 18.1 g |
*Grain weight measured at first 9.1 m.

