The Scientific Anglers Sonar Stillwater Intermediate Fly Line
A full intermediate sinking line designed for a controlled, consistent retrieve beneath the surface. Sinking at 1.7 inches per second, it’s a versatile choice for covering the upper layers of a lake with nymphs, wet flies and streamers.
- Full intermediate sinking fly line
- Steady 1.7 inches per second sink rate
- 45 ft head length
- Overweighted by two line sizes
- Designed for multiple flies and long leaders
- Excellent for nymphs, wet flies and streamers
- Textured hang markers at 10 ft and 20 ft from the tip
| Specification | Detail |
|---|---|
| Sink Rate | 1.7 inches per second |
| Length | 45 ft head length |
| Use Case | Nymphs, wet flies, streamers |
| Line Type | Intermediate sinking |
| Features | Textured hang markers at 10 ft and 20 ft |
FAQ
What is the sink rate of the Scientific Anglers Sonar Stillwater Intermediate Fly Line?
The sink rate is 1.7 inches per second.
Is this line suitable for use with wet flies and streamers?
Yes, it is excellent for nymphs, wet flies, and streamers.
Does the line have any visual markers to help with depth control?
Yes, it has textured hang markers at 10 ft and 20 ft from the tip.


Alexander Graham –
This line delivers a steady sink rate and works well with both nymphs and wet flies. The textured markers help me keep track of depth during casts. I’ve used it in several lakes and it performs consistently.
Dorothy Terry –
Good for intermediate fishing in stillwater. The 1.7 inch per second sink is reliable and the line handles long leaders without tangles. A bit heavier than expected, but that’s fine for my setup.
Anna Lee –
I appreciate the consistent retrieve and the markers that make depth control easier. It’s a solid choice for covering upper lake layers with various fly types.